Comment OS/400 (Score 1) 286
You seem to have ideas (I approve), but it seems to me that the things that you(I?) want are hard to fix as they require controll of the full stack from end to end of the experience you are presented with. So; not gonna happen.
If you want to look at something that could have been I believe OS/400 has a command sensitive shell that knows about help, options etc that can guide you for the specific command you try to use at the moment. IBM could do that because they made all the parts involved.