I switched to zsh at a time where completion for commands parameters except file paths in bash wasn’t really a thing, you could add some with a script, but they didn’t work well. I’m sure the situation has improved by now, but someone told me recently, there are still no descriptions for the completions. I find it very helpful and it saves me opening a man page a lot of times. For example, typing grep -<Tab> gives me this:

And now I’m so used to many little features (mostly around the syntax) that wouldn’t be a reason to switch on their own, that I find bash cumbersome to use.

Isn’t sha512sum a regular binary, that should not depend on the shell at all? What does nushell do that something like that can break o.O