I would also love this feature, but I understand the argument that it's major feature-creep for this project - as I understand, with mosh as implemented it would be difficult to integrate. IIRC they would have to roll some kind of TCP over UDP? I'm not sure, it's been a while since I looked at it. I'm willing to accept a good tool missing features over a poorly maintained tool that at some point had all the features I care about.

And realistically $600 is a pittance compared to the long-term cost of maintaining a feature that has the potential to dramatically increase the size of the code base.