It's crazy how much better things are now. I had the same reaction some weeks ago when I wanted to play Leathal Company with friends and remembered I'm on Linux while they all used some 3rd party Windows only mod manager. One day later I found r2modman in the AUR which automatically recognized Steam + Proton and everything just ran. And there is even a Titanfall 2 cross platform mod program!!!! The sofware support just keeps getting better every day.