One game I used to play recently started working suddenly in the latest proton major release (I think 9), it wasn't mentioned in the release notes and it has no community around the game since it was released around windows vista, as well as being pulled from stores for many years (I still have it on steam) so I don't think anyone intentionally fixed it but probably just a result of some system call being implemented or tweaked to behave closer to correct.

So yeah, it's very good to test your broken wine apps every 6 months to a year because slowly anything I ever had issues with in wine is starting to work.