Well day and date is a big factor, as I already said in an earlier reply. As for price, I forgot that some were priced 10 bucks more on Switch. However 10 bucks is a far cry from 40 bucks. Plus some games that cost more on cart, were price matched on the eshop like RiME. An oversight on my part, but my point still stands.
I do not need justification for my trade in, the experience had with those games is all I need and will ever need. I was simply sharing my experience as an example of how even someone that can afford the Switch version of these late ports, supported the Switch heavily both on forums and with my wallet for a year and a half, and got put in a situation where a choice had to be made...cheaper versions of the same game at a higher quality can draw us to choose those versions over portability (despite what I have been preaching all this time).
Again, not saying the ports should not exist or that there are not those that benefit from them. I am simply pointing out that these late ports are not selling as much as devs would like them to and the main reason I believe that to be the case.
So the main point you think the ports fall down is that they didn't release on the same date?
I mean, I would have loved to pick up a copy of Doom for the Switch in May of 2016 when it launched... would have just been a 10 month wait for the console to launch to play it though.
This isn't just a Nintendo Switch exclusive thing with games being ported later costing more, I mean if you look at something like Heavy Rain from the PS3, at the point when that came to the PS4 it was possible to pick up the original PS3 game for less than a tenner, PS4 version launched at 40+ for the same game, very marginally cleaned up textures. Ultra Street fighter 4 on the ps3/x360 cost about 15 on that system when it launched in a broken mess on the ps4 for close to 30.
What I mean is, there is almost always a way to play certain games cheaper, and I know in your case the ps4 versions of the games are going to be a higher resolution (until you start talking about doing remote play to the Vita with its 540p screen even in high quality mode of remote play) but the thing which people who are a large fan of the Switch (talking from my own experiences here) love with it, is the ability to pick up the system, stick it in my bag and go on a flight with it, enjoy it all the way to my destination and play a full console AAA game while chilling next to someone tapping away at angry birds or so on their phone. Even in the best case scenario of the Vita perfectly functioning as remote play... you cannot use that in traveling scenarios, unless you've figured out a new way to connect it to the PS4 on flights and such.
Before for me I would purchase a game... say Borderlands on a console, and then for the Vita I got the port of it on that platform too, the Vita version I think cost about 30e the console one I got cheap enough too for maybe 20e but still for the "switch" type experience of having the games both as a home console and a portable machine the asking price is just a single cost for both versions of the game.