I use zsh primarily, but I’ve been using nushell for various tasks lately.
My ZSH is heavily configured, based on the OhMyZSH plugin pack but with some customizations. I use the starship theme (not the built in one, but the standalone StarShip powerline prompt that works with almost any shell).
Been experimenting with nushell lately, it’s still new and missing some functionality, plus not being a posix shell means its syntax is different, but it seems extremely capable and very fast, plus it’s data operations and piping capabilities and operations (it’s main big thing) is really nice!