Paul Thurrott, writing about Windows 9 details, says this about Windows 8:
Windows 8 is tanking harder than Microsoft is comfortable discussing in public, and the latest release, Windows 8.1, which is a substantial and free upgrade with major improvements over the original release, is in use on less than 25 million PCs at the moment. That’s a disaster, and Threshold needs to strike a better balance between meeting the needs of over a billion traditional PC users while enticing users to adopt this new Windows on new types of personal computing devices. In short, it needs to be everything that Windows 8 is not.
Thurrott describes Windows 8 as a “debacle”, but methinks “shitshow” is the more apropos term.