PowerShell removes the pomp from running processes and adds it squared into running normal functions.

Isn't that Windows only?

Not any more: https://github.com/PowerShell/PowerShell/releases/

I quite like Powershell on Windows, but I'm not sure I dare try it on Linux. I think it might make my head explode.

It's quite clear Microsoft are only a couple of years from either an official linux distro or some halfway house of using a linux kernel internally for major os functionality, so it makes little sense learning some new(ish) shell when you could just use bash (via wsl or whatever).

No, but I haven't seen many Linux users (admitting to) using it.