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MS-DOS truly beat CP/M-86 when it extended the APIs and features in PC/MS-DOS 2.0 (heavily inspired by Xenix), like hierarchical file system.

From then on, applications would target MS-DOS in addition to the curse of being too IBM PC specific



For a while Microsoft was betting their future with Xenix, what an alternative reality that could have been.


I somewhat suspect that if not for multiple materials (not from MS) promoting deep dependency on IBM PC specifics, it might have worked out.




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