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Well, there is this different timeline in the universe where Microsoft decides to keep selling Xenix instead of focusing on MS-DOS.

... and where it is not successful.

That we will never know, Xenix was the most successful PC UNIX clone after all, Microsoft just decided UNIX wasn't the future of PCs.

And they were kind of right, the Year of Desktop UNIX/POSIX is WSL, Android, ChromeOS, macOS.