Different games are harder or easier to emulate depending on how they run code. Those that stick to the rules and run within the development drivers/APIs or whatever they are called which are a software layer between the code and the hardware like Direct X can be more easily emulated as you can rewrite the software layer to work on different underlying hardware however if you get exceptionally clever coders who low level program consoles directly accessing the hardware features become dreadfully slow when emulated like the Rogue Squadron games on Gamecube. Those games seem to need a lot more processing power for emulation than most Gamecube titles. I assume the Switch 1 will be the same in that the best titles may be sluggish but Nintendo can write optimised T239 code to replace the really demanding code of the original game. It's one thing for Nintendo to make the effort for their games that sold millions but for smaller Switch titles that didn't sell well anyway I'm sure there are developers that can't be bothered to update as not in their financial interest to do so. I suspect many Switch 1 games will get overlooked as not commercially viable to rewrite code and without those optimisations may not run that well. I suspect we will get the full spectrum of results. Some Switch 1 games that are massively superior on Switch 2 and others that are terrible compared to running on the original Switch 1 hardware.
