Many years ago I had to write a script that ever developer in the company would occasionally have to use. After running into compatibility issues with python and bash I went for zsh, and never heard a single complaint. I still use bash as my main shell, out of habit (and because I know it'll be installed on whatever remote server I connect to) but zsh isn't so different. It's array syntax, for one. And figuring out what directory "this script" is in, regardless of `pwd` output, is easier.