I used fish shell for a lot of years.

Ultimately, I got tired of having to translate snippets for my use and went back to zsh for the bash compatibility. Zsh becoming the Mac default also gave me an incentive, because I prefer to use system native if it's anywhere near up to date.

But a lot of what I have to cobble together in zsh via antigen and omz was batteries-included or fisherman-easy in fish. It's very powerful right out of the box. I miss it all the time, and it may get me back before it's done.