Fish is also not POSIX which has always been its, and my, issue. I use zsh+starship and my own very minimal init stuff+zsh autocomplete and syntaxhighlihg plugins. It’s not a perfect setup. I wish fish would “just work” but it doesn’t. Frequently I had to look up for “workarounds” for my setup. 25 years in, I think I got it and i just keep my zshrc and `machine-init.sh` on point for my-own-style-experience. I think a lot of that could be simplified with fish+starship, but it’s just not there.