>Except the community really can't and live to tell anyone about it (aside from a fringe fork), because the Python Foundation won't let them use the Python name for the fork
Yeah, but a name like "Cobra, a fork of Python 2.7" will do just as well, and everyone that cares enough will know what it is and where to find it.
Anyone who's every ported a very large project from 2 to 3 might end up despising the PSF for this purpose and might tend to search for a new language (Nim? Go? JS? Scala? Ruby?!). So much for the B in BDFL..