Curiosity. It began while trying to play around with programming, and finding a lot of talk and resources about Linux, and then trying it. 3 broken Debian installations just for messing around, then Ubuntu as a more permanent install, all of this alongside Windows.
Then I began using less and less Windows until I just deleted the Windows partition because I needed more space.
Heroic is a client for GOG and Epic Launcher, so if I install a game from there, I use Heroic.
Lutris is more generic, and has specific script installers per game, so I use Lutris as a fallback if the game is from somewhere else, or the game does not correctly work with Heroic.
Then, as a third fallback, I try to install the game with Wine directly, then add it a shortcut on Steam to benefit from Proton through Steam. In the above cases (Heroic and Lutris), they would be using their own packaged version of Wine/Proton, so it’s worth to try it before giving up.