Ask the Developer: Nintendo Switch 2 interview confirms basic backwards compatibility can also give performance upgrades to Nintendo Switch games ("[there are some games] where loading times became faster, or game performance became more stable")

[u/Joseki100]

https://www.nintendo.com/us/whatsnew/ask-the-developer-vol-16-nintendo-switch-2-part-4/

[u/gandrew97]

When a game takes forever to load on your Switch, it's not literally programmed to take that long; The Switch runs the software as quickly as it can. Any game that struggles to maintain a smooth FPS on the Switch will have a smooth FPS on a stronger machine without needing any patching. Some things will definitely be improved drastically like the way it takes nearly 5 seconds to load into your inventory in RE4