How many daily drivable desktop operating system( familie)s are there?

Not talking about all the Linux distros or different versions of Windows obviously. And my definition of "desktop" would be "able to connect to WiFi and launch a modern web browser", since that would cover 90% of most people's use cases.

I know of:WindowsMacOSGNU/LinuxGNU/HurdBSDHaikuOS

What others are there?