@aeva it's so wild that in 2025 I can buy a game on _release day_ and expect that it will just work on Linux!
I almost never have to check Windb/Protondb for compatibility anymore :)
(That said, my personal white whale for Wine compatibility is a 15 year old WPF game called Academagia. I've tried so many tricks to get it to work and have failed every time.
Wine is fantastic now at running graphically intensive games that use DirectX/OpenGL/Vulkan/whatever. It still struggles with little spreadsheet games built on UI libraries like this one.)