[adontz]

I've successfully replaced django.contrib.auth multiple times. It it not easy, but it is not too hard either. Honestly, everything else they do could be a regular Django app. Looks to me like forking a big project became a marketing move rather than technology necessity.

[outofpaper]

100% agree. Let's hope they maintain compatibility so stuff developed for Plain works with Django.

[darthwalsh]

In the FAQ they said that extensions would not be compatible