As a ux/ui nerd for me its mostly that its a very thoughtful user experience. I have been more or less good at the terminal at different points in time, but if you don't spend much time there its easy to forget every command and how to do things. And ultimately, I don't really enjoy using it as an interface. Its a blank void with little to nothing in the way of affordances-- remember the magic words and you can do anything. But the fact its only used by technical folks means often no one cares to add affordances or ease of use even when it might be possible, and when they do its from a power user perspective.

Fish feels like a much more thoughtful execution of how to interact with a command line interface, and doesnt require a ton of time spent in a terminal to achieve that better ux. Though I still want to set up a nice prompt that improves legibility and make things a bit easier still, I just haven't played with starship enough yet.

There are more things I'd wish for in a perfect world, but for me fish is a very nice step in the right direction :)