The main differentiator of fish over everything else is it prioritizes intuitive behavior over backwards compatibility.
Zsh is to bash as c++ is to c. Most bash scripts and habits will work in zsh, but zsh is just more convenient and has more options. Fish is intentionally different.
Do I wish fish had existed instead of bash so we had a nicer terminal experience? On the whole, yes. But I also couldn’t be bothered to learn another shell where most of the instructions online won’t be able to help you, and I ended up sticking with zsh.
Remember that anthropic are renting this data center, and should be seen as just as responsible as Musk.
https://www.theverge.com/science/935229/spacex-anthropic-ipo-ai-capacity-deal-colossus
Also Musk is such a loser, he built and ran this giant polluting data center without knowing what to do with it, and ended up renting it out at what looks like a loss.