…did you just completely forget about Macs? That’s about 18% of the desktop market.

But they also are prioritizing mobile development (though they don’t have anything working there yet) prior to Windows development. That’s a much, much larger market share.

Additionally:

• Early adopters are likely to be devs, and devs use Linux and Mac much more than typical end-users.
• Even early adopters who do use Windows often use WSL, which now has first-class support for GUI apps.