I actually tried No Man's Sky on linux few days ago and I had no real performance issues. Everything ran fine on ultra with a 21:9 1440p monitor and a 2080.

I do agree that the performances are no the same than on Windows (15-20% less FPS on average).

I don't know about the official proton for No Man's Sky, but I used the Glorious Eggroll's fork[0].

[0]: https://github.com/GloriousEggroll/proton-ge-custom

Meh, I recently thought I try that and bought Battlefield 1 on sale and tried it on my Debian 11 box. Once it started to download that Origin stuff I thought "that won't work" but it just did perfectly for me, no tuning needed.

Some even work better, e.g., >10 years ago I had a very crappy ADSL connection and in Counterstrike I got latencies of >150 ms with quite some jitter to >250 ms under Windows and even got kicked off from some servers for that :(

cue to WINE and running it under Linux (IIRC I was using openSUSE then) and I got 80 to 90 ms stable on the same servers, I think that was the time I decided for myself that I'll never go back again, and so I dropped my dual-boot setup in favor of Linux only.

FWIW that is the case with Windows too, which is why sites like pcgamingwiki[0] exists.

[0] https://www.pcgamingwiki.com/

ProtonDB often does have comments listing workarounds, configuration tweaks, known issues, and things/patches to install to achieve the best results. In that sense it reads very much like PC Gaming Wiki, which lists all the same things for Windows games.

With the except of games that don't even pretend to work, all of my games perform well. My computer is rather good though. I also play Overwatch through Lutris and that plays just as well as it ever did on Windows.

I play No Mans Sky at 1440p on my 1050ti. Framerate hovers around the upper 90s, I frankly couldn't be happier. I also didn't need to tweak anything to get it running, which was not the case on Windows at all...