Love nushell. It's just about the most practical functional programming language I've ever had the pleasure of using.
I'm using fish as my default shell since it's more standards-compliant and plays nicer with tools that modify your environment. But any time I need to do more complicated shell scripting, I'm breaking out nushell.
Started dating a girl who liked it when I grew it out... so haven't cut it just about ten years. She's gone, but the hair stayed. I never found a barber who could consistently cut it the way I liked, so the only alternative I could see is regularly buzzing everything off.