Ironically, Win32 has sometimes become more universal than native Linux binaries. For example, Baldur's Gate 3 released a native Linux version only supported on the Steam Deck, whereas the Proton version is verified for Linux almost everywhere. Win32 became the stable Linux gaming ABI.
Same with warhammer, where the developers are claimed to make an actual effort to support Linux with native binaries, but the windows version are more stable than the native Linux version. Ironically.
When I played Hollow Knight some years ago on my Steam Deck, I had to switch to the Windows version under Proton because the Linux native version was giving me random graphical glitches that made it impossible to see what was going on until I moved to a different screen and came back.
Valve has a containerized Linux runtime (ala flatpak) to solve this issue for native Linux titles: https://gitlab.steamos.cloud/steamrt/steamrt/-/blob/steamrt/...