Switch did get a lot of extra new games because the Wii U flopped. Mario Kart 8 is currently their top seller and most Switch owners never got to play it on the Wii U. Splatoon 2 and Mario Maker 2 feel like iterations on the same game, but since they started on the Wii U they are also new to most people.
I don't think "Switch 2" will benefit nearly as much from Switch ports, but I do think it would be a good idea for them to port and remaster even older games. I am ready, willing and waiting for the first 3 Zelda games to get the Link's Awakening treatment. And of course they could actually remaster Mother 3 and release it worldwide. They have a hell of a backlog of potential ports that go back further than the Switch and Wii U.
curl-6 bet me that PS5 + X|S sales would reach 56m before year end 2023 and he was right.
My Bet With curl-6
My Threads:
Master Thread, Game of the Year/Decade
Switch Will Be #1 All Time
Zelda Will Outsell Mario (Achieved)
How Much Will MH Rise sell?
My Bet With Metallox