[Technically]

> Plan 9-based technologies are a part of most, if not all, operating systems today (even Windows!).

9p is indeed a great technology—I would have also thrown in utf-8—but most of plan9's ideas remain quite fringe. I would pay a ton of money for an OS with both bind and browser support. Plumber is still leagues better than anything offered by macs/linux/windows.

That said, I don't see "fringe" as being mutually exclusive with "legitimate". TempleOS had some features that other OS's could use, too—its use of hyperlinking is actually really cool.

[_b8r0]

> TempleOS had some features that other OS's could use, too—its use of hyperlinking is actually really cool.

If you want to see what doldoc and plumbing in one system might look like, check out Oberon[1].

[1] - http://ignorethecode.net/blog/2009/04/22/oberon/

[butterisgood]

9p is being used by Microsoft in WSL2 to access host files from linux over v9fs - last time I looked anyway.