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> I think that an operating system where you can't rename or delete a file that is open by some process is idiotic beyond words,

This is not an inherent limitation of the VMS or NT architecture; I'd rather argue it's for compatibility.

> even without MS-DOS drive letter names thrown in.

This is also legacy carried over from DOS and OS/2.

If you can't change it without breaking countless unknown appliction programs in the wild, it's part of the architecture.

If you're incorporating uncool quirks from crappy previous operating systems into your new one, don't criticize Unix.

Oh, and don't use its implementation language, and related concepts and techniques.

Are you mad? I didn't even criticize Unix at all!