I suppose I should say why I choose bash... main reason is that by sticking to bash things are reasonably familiar when I remote into another machine; and also really I don't have massive pain points with it anyway. Plus bash is the default on all the platforms I use (osx, win10, rpi linux).

Philosophically it's a lot like knowing the base language before you learn an abstraction, or the real git commands under your aliases. Plus while shell alternatives have some really neat tricks, they also have some overhead to learn and maintain.

It's not a strongly-held opinion though, I'm just curious to see what people say :)

I use zsh. Even though It have lots of features, I use it only for the amazing themes and the out of the box git aliases.

I have always used Bash and never thought about changing it. It is great!

Could be an interesting idea to build a Shell with web technologies and bake all personal habits inside. Also, it would be familiar on other machines as long as it's installed.