387
Leaks confirm low takeup for Windows 11
(www.theregister.com)
This is a most excellent place for technology news and articles.
The did name it something else. They named it 10. A lot of programs had checks for windows version looking for 9 for 95/98 which would cause issues without updates. So it's better to avoid it altogether.
That's an urban myth. Programs check for the internal windows version major and minor number which doesn't resemble the official name in any way. The version for Windows 9x was version 4 and the version for Windows 9 (if it existed) would have been 7.