The two projects (Pinephone and Librem) have definitely diverged in terms of their goals, but that's fine. I don't see any lack of contribution to the mainline

The two projects (Pinephone and Librem) have definitely diverged in terms of their goals, but that's fine. I don't see any lack of contribution to the mainline kernel or upstream code from either community. The main divergence between the two is the price point and how the communities are run. As for fragmentation, well, if you want a choice in distro, then fragmentation does kind of happen as a result of that. But overall a lot of the momentum is in the same direction. The biggest sticking point I see happened years ago, when Purism opted to make Phosh + PureOS and make it GNOME based instead of rallying more effort to the UBPorts project. That said, it's free software, so this happens all the time. (Don't get me wrong though, I really love what Ubuntu Touch has become, and the UBPorts community too!)