Yes, this. I recall back in the MS-DOS days that I frequently used a text-GUI help menu that showed all the commands you could do and what each one did.
Personally, this is what I struggle with on *nix shells - I can do the very basics but there's little guidance showing you a broad overview of what is possible. Granted, the world is bigger now but if you asked me how to do a random task I'd probably google it first instead of reading a man page.
Once you learn the 8000 or so commands, it becomes incredibly intuitive.
It's not just the shells! ;)