In which people forget that computers have other purposes beyond being boxes for CTF competitions. Shared mutable global state isn't always bad.
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The problem is that Unices use access control, rather than capabilities, so ensuring state is shared only by those who need it is quite a bit more difficult than just punting, and declaring that 'those who need it' is 'everyone'.
Nor has the design problem of a user-friendly capabilities architecture truly been solved, IHMO. Nonetheless, we shouldn't confuse convenience with correctness.