I wish there were good alt-shells on Linux. Murex and Nushell are both still pretty nascent to actually use (not for portable scripts but just general day-to-day tasks) - and if it's something you care about it's annoying that Nushell is MIT-licensed instead of a free license, which kind of also precludes zsh.

I genuinely kind of miss working a job that required using Windows because PowerShell is genuinely nice to use for throwaway tasks and working in a shell to do things like parsing json, fetching data from a http server, whatever.