I hope Matt can get better but in the meantime, the community needs to fork. In the same way that LibreOffice forked from OpenOffice. Otherwise the blogosphere is just going to adopt one of the competing platforms and many of them (at least many of the "user friendly" ones) are not open source.
As much as the community may want a fork, I suspect it's not going to pick up much momentum unless it's created by a larger company with skin in the game, i.e WPEngine.
I agree and that is also my fear. That would mean that people will just move to something proprietary like Squarespace or Wix. This type of shift has happened many times before in tech so I consider it likely.
I get where you're coming from but I find it more likely that most people will just move to Squarespace, Wix etc. - away from open source and towards proprietary platforms.