I've always been thinking there can be a better shell like having a split pane to show the list of command options with descriptions as you start typing in the command or show snippets of a preset of command options that does task X as in search by use case instead of going to stackoverflow every time.

I think the way people handle shell, as in typing commands on a dumb shell, has not improved for decades and I don't know why. The only thing they help without explicitly asking is with autocompletion.