I didn't expect Linux to be above macOS despite Wine's awesomeness. - Windows 94.84% - Linux 3.05% - macOS 2.11%
This isn’t surprising at all. In this context, “Linux” means “Steam Deck,” which is basically a plug and play console being sold at cost for $300-500. Macs actually run a lot less of the Steam library without doing pretty involved workarounds like hsing CrossOver. Since Valve sells the Steam Deck they put a lot of work into getting Windows games to run on Linux automatically. They didn’t put that effort into the Mac…
Edit: fixed % cos I was way off writing from memory.