When it was on sale recently I didn't buy it. Instead I removed all Sony games from my wishlist, knowing they would require PSN even for single player games.

For Rocket league you need to manually enable proton under properties.

Its running without problems for me now

As long as you arent doing anything to advanced nix is basically only a configuration languages. You probably have to make heavy use of the option search to know where and what to configure

AFAIK steam has optional drm. If the devs dont use it you can play the games without steam. I think it says on the store page if it's drm-free

Thanks for the reminder. I've been meaning to switch for a while now but I never got to it

You could basically always skip the first 3-5 comments on every post because their only purpose was to gain as much karma as possible. There were way too many generic comments that you would see over and over