I did not imply that the default thing is necessarily better than hobby thing, but that someone who knows enough to know what a shell is knows what they want and how to get it. And if they made a poor choice, so what? It's easy to change one's mind.

Scrutinizing an idea for a new method of programmer-computer interaction from the perspective of a newcomer makes little sense to me, as does the "competing standards" thing from a neighboring comment, scrutinizing OP's idea for being potentially unable to win a popularity contest. OP's terminal system isn't a standard struggling to gain widespread public acceptance. It's just some guy's program.

I think that an idea about programmer-computer interaction ought to be scrutinized for its merit in facilitating programmer-computer interaction, and that criticism from a perspective that isn't the programmer's and isn't the computer's is useless.

PS. You forgot one of the most interesting Unix shells, es. It could turn out to be the best shell you've ever used.