What kind of QoL features do you mean? Gameplay features?

This past month, I set up JKII to run in super ultrawide with high res textures and fixing the reticule position by dragging and dropping a few files.

Set up Splinter Cell Enhanced to glow up the PC version of the game.

There are other examples, like the X-Wing / TIE mods.

In these cases, my own goal has been to adapt the games to modern systems / formats while preserving the core gameplay.