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>But I mean come on, they're Microsoft. If they really wanted filesystem access to be efficient across systems, we'd have it by now.

Here's one of the developers saying it is hard back in the WSL days.

https://github.com/Microsoft/WSL/issues/873#issuecomment-391...

The reason makes sense to me, but I'm not an expert. Maybe you could expand on why you think they could do it but chose not to?

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Seeing how every file system (NTFS) imrovement since windows 7 (like new compression methods) is done in layers running on top of ntfs. I think that Microsoft has either lost the source to ntfs driver or institutional knowledge of how it works.

The real answer is that they're building filters on top of NTFS because that's precisely how it was designed to work.

GP's explanation was almost as plausible, and much funnier.

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