[anthk]

9front it's the truest Unix philosophy since Unix v6. It makes it much better. Proper devices and network connections as files, plus namespaces and aux/listen plus friends. It makes AWK better than Perl and rc it's much simpler without the bullshit of sh. You only have functions, not aliases, and the syntax it's much saner.

On Powershell/C#, TCL/Tk might not be as powerful but it works under Windows XP with IronTCL unlike MS' own and newest C# implementations ( >= 4.5). Double irony there. TCL can help to write some useful software such as a Gopher /Gemini client with embedded TLS support. And the resource usage will still be far lower.

On embedding, TCL wins here, hands down. It's everywhere.

And JimTCL can run under a potato.

[pjmlp]

If we forget that the authors moved on into Inferno and Limbo, while re-doing all the Plan 9 decisions they had to rollback like Alef as main userspace language.

[anthk]

9front lives today and Inferno can run on top it perfectly well.

Golang it's almost the byproduct of Limbo, and we owe tons of legacy or 9front's C compilers into Golang too.