I wonder if ps plus giving away indie games all the time is affecting sales. I think in the last year I've only bought 1 indie game on the ps4. I always think in the back of my head that any indie i want will eventually be on plus.

In my opinion the main reason is that the Switch is lacking big games. To explain better, games that people perceive as 60 euro games instead of games sold at 50-60 euro that seems 20 euro games. My Switch this year hasn't seen any NEW AAA game. Bayonetta 1-2 remaster, Hollow Knight which is an indie, Galak Z Free to play, Fortnite battle royale Free to play, and that's it. The lack of big games is strange for a console doing this well. No big games, the only one that remains are indies. Someone will say Dark souls, LA Noire ecc... are remasters too. After a splendid 2017 this 2018 is a big let down so far and my plan is to buy some indies, just to play something on Switch. You know why? Cause there's no other option.

Switch is still early on its life... on the ps4 the indie market is swamped and thus its harder for a new title to sell very well (because it has competition. Switch indie market is still doing ok but is starting to get swamped, and thus Indies releasing on that platform will start to struggle.

But what if the sales number on switch aren't that great but its still selling 4v1, I think that is an interesting question... just would show what I said above to be true.

Ofc it is, when the Switch is getting 1 game in the next couple of months.

User Banned By ~ PwerlvlAmy

It comes down to the type of gamer each platform has, and the games library.

Wait until RDR2, CoD, Battlefield, Spiderman comes out.... those will sell on the PS4.... PS4 users simply want bigger games, than all these small indies.
Switch sells indies because it doesnt have all these 3rd party multiplats.

A difference in installbase does that.

You don't expect the Fifa/GTA crowd going with a game like Dead Cells.

"Dropped indies" is a bit harshly put. Indies are right there on the Playstation Store, alongside all the other games. It's just that the library is enormous at this point.

Factually wrong. But nice narrative goalpost. indies just sell better on Switch because the installbase cares more. Simple as that. It would sell like this even with 20 triple A titles getting released on Switch and 0 on PS4 in the same month. Interest is what matters. Let's not make excuses.

Theres also the option of buying games you didn't buy in 2017? Or buy games on other consoles you own?

Nintendo is not forcing anyone to buy indie games. 

No one is forcing anyone to buy Indie games.