Everything Valve does to Proton eventually makes it way back upstream to Wine proper.

Ah okay, that’s nice. I wasn’t completely sure about that. At least if that’s the case and the projects are so related, I’m wondering why Proton doesn’t work on macOS. I could have imagined the code bases to start to differ more and more.

But I mean, I’m fine with Wine (or to be exact the Wine/Crossover version I can get with Homebrew).