Since you mentioned Nier: Automata, I'll just add that I've been playing it with proton for the past 2 weeks. I'm at ~20 hours of playtime and it's been flawless so far (without resorting to any 3rd party patch like FAR).
What a very complete and interesting writeup, thank you for sharing.
I've also recently started using iA Writer, on Win 10 and Android. The program is solid to a fault and extremely well designed, with the flexibility of saving .md files that you can save and export everywhere. Highly recommended!