[loxias]

Mosh isn't proof of concept. And it's not not maintained either. It's just "done" (in my opinion).

Not all software needs to continually change. There is the concept of software that does one thing, and does it well.

THAT BEING SAID... if your complaint is regarding the SSH agent forwarding, I might be convinced to maintain a fork with that, and only that problem being addressed. :) That one's personal to me, and I've been meaning to poke at it since... well before it was released to the outside MIT community.