Agreed. The about page also says that the plan is to update Plain to include new Django changes, but that would also be hard.
Django has a "contrib" package. I could see a fork with a fast moving contrib directory, or even just the Django project doing that with an explicit call-out for that package having a different set of breaking change expectations. A bunch of features started in contrib and graduated out of it over time, would be nice to keep that going.
