There are definitely a bunch of games that I would have purchased if they had physical releases instead of crappy key cards.  Resident Evil, Oblivion, Final Fantasy, Pragmata and Cronos to name a few.  I don't really consider myself as missing out by boycotting these key card titles because I most likely won't have the time to play them all anyway.  However, as far as a guy that keeps all my media physical and has a small collection of games starting with the Coleco Vision and NES up to present, it's too bad those titles won't be a part of that library.

I understand the issue with the cost of the game carts and also the storage limitations, and I feel that is an oversight on Nintendo's behalf that should have been thought better of and reworked before Sw2 released.  Despite those hurdles, Cyberpunk and Indiana  have shown that, within reason, it can be done with talent and care.  I purchased those two games not knowing if I'll ever actually play them.  I bought them solely to support quality games with physical releases.

I see no arguably good purpose for the key card.  Who actually cares about the measly amount of coin you'll get back for trading the used game in, especially as key cards are quite an unpopular format.  So, you take hours to dl a game that takes up a goodly portion of your storage...and still have to carry the cartridges with you to "unlock" and play it.  It is arguably a better idea just to purchase the digital format and not have to dick around with the worthless cartridges.

After the onslaught of game announcements the past couple weeks, you can bet that if there is a physical option for any of them, that's where my dollars will be spent.

Edit.  after the Oblivion physical edition announcement, that game got my purchase.  Gotta put our money where our mouths are.

I own switch 2 since last Christmas. I own 3 games: Metroid prime 4, Donkey Kong bananza and Cyberpunk.

Not sure if serious or not, but just because they are worsening the offline experience for regular cartridges does not justify the existing issues of game key cards. 

Seriously, the longer I hear about the Switch 2, the less I want to buy it. You should be able to play even if not fully updated, moreso for a handheld, which it will find itself in places with no internet. 

I see nothing wrong with game key cards. They are a happy medium between digital and physical. Yes, I need to download them. But my purchases aren't forever tied to an account. I live in a two child, two parent household with two Switch 2s and three Switches. Trying to manage family sharing on Nintendo's system is a nightmare. Having to renew every 14 days, having to have the systems next to each other. Game Key Cards just let me take it out and put it in another Switch 2 and just not worry about it.

Physical >> GKC >> Digital

Do you not understand how a rental works?  If you can buy a game for $70, then you don't also rent the game for $70.  You rent it for something like $5 - $15.  I'm calling GKCs a rental, because that is what I net pay after I resell the game on Ebay.

However when I call GKCs a rental, I am being generous to them, because actual rentals were either lot more convenient (or cheaper) than reselling a GKC.  I can pay about $10 net and go through the hassle of selling on Ebay or I can pay about $40 net and conveniently trade the game to GameStop.  If Blockbuster were still around I would be able to conveniently rent the game for something around $10.  That would be a better option than anything GKCs give right now. 

And I don't get to resell the game.  I have to resell it.  I don't have control over this anymore.  I don't actually own the game.  The game is going to lose all value eventually regardless of how good it is.  It would be stupid to not resell it, even if I would like to keep the game forever.  GKCs really do suck.  They are objectively worse for the customer than actually owning a physical copy of the game.

You strawmanned GCK vs Physical.  Yes they are worse than having the full game on the cart ... did you not read "this a step above a straight digital game"? They are objectively better than a digital copy of the game @CladInShadows gets it.  Their situation and mine are very similar with 5 Switches in the house. Admittedly I am very sure this is not the norm.

You cannot sell a digital game without also selling the account it is tied to (typically against the EULA).

I remember the days of blockbuster well, I also remember that you have a limited time with the game and most likely have to make 2 trips.  One to pick it up and if you didn't call ahead, the game you want may already be rented out, then after a week or less you have to take it back.  This is not my definition of "convenient" nor most peoples, hence one of the reasons there are hardly any rental places anymore in the days of Amazon and digital delivery.

It is also too early to tell how well GCK will hold their value in the coming decades. You PRESUME they will have no value.  You could be right on that you could very well be wrong.  If the download runs through Nintendo GCK could very well be supported just like Wii downloads are, where even though the shop is shuttered, you can still download your content from the official source.

Your "I have to resell it" is just silly.  No one is putting a gun to your head.  For you, I get your view is that it is a rental but in some cases games will be too large for a cart so it is either GKC or Digital.  So again I will say: It just seems odd that you would say something sucks that you have an option to re-sell rather than be stuck with.

Giving you an option to "rent" games via GCK is better than being stuck with a digital copy. For some like CladInShadows and I they are more convenient than Nintendo's digital sharing. 

End of the day, where possible, I would rather have the full game on cart.  If that is not a possibility at least I can sell a GCK if the game sucks and is not worth my shelf space.

Edit: Yes, you can trade in physical game key cards at GameStop. These function just like standard physical cartridges, meaning you can trade them in for cash or store credit. However, digital download codes that have already been redeemed on an account hold no trade-in value.

I don't care for them they have completely ruined the physical market for Switch 2 you can't get a complete physical collection since it's a coinflip for what games use them vs actual physical and we have publishers like Square only using Key cards on every game and NIS America saying they chose GKC because it best for their customers so Trails, Ys and Disgaea on physical is dead whilst GungHo who are publishing the Sky Remake committed to physical.

There is also a problem of every game that has a GKC blocking Switch 1 to Switch 2 upgrade paths so you can't even buy the Switch 1 physical and pay a small upgrade fee fo an upgrade which in most cases are massive improvements on the Switch 2 version so your left which the choice of a largely worse version on physical or a GKC on Switch 2.

GTA 6 made me a much bigger fan of GKC.

GKC>>>>>>>>>>>>>>>>Code in a Box.

Yes, for me, it's about convenience and having more control over a game I own.  I'm not a "collector" so I have no emotional attachment to pieces of plastic.  I just want to be able to play my own games with the highest level of convenience.  And you're right, there probably aren't many households with a lot of switches in them.  Especially Switch 2s.  But there will be.  Especially when the inevitable Switch 2 Lite comes out. I wish more companies did the Steam thing and let you share your digital libraries across accounts, but could allow only one copy a game to be played at any given time.  But until then, Nintendo has the inadequate family plan and I will continue to get GKCs.