Would be nice if games were "simply" updated with FSR3.1. Avatar, Star Wars Outlaws, Cyberpunk, Hogwarts Legacy, Jedi Survivor... to name just a few, Then AMD's drivers could do the rest converting it over to FSR4.
You can use any version with any version you simply need to be able to run the version on your card so if your card can run dlss xess or fsr of any kind and the game is supported then you can run the version you have so any scaler game in the list will run fsr4 correctly others i guess hit and miss more engine dependent ill be trying red dead redemption 2 when home from sisters tonight but holy it works very well