I read it..again..before my last comment...did i miss something? Is there an example at the URL or a link their in which depicts a project that successfully accomplished a cultural transition around an existing codebase instead of building a new culture while building a new codebase? To my reading, both Dreamwidth and AO3 are examples of doing things right very early on. Or did a read that wrong?
But I do appreciate the RTFM attitude...it quote comforting while I am cast adrift in this brave new world of inclusiveness.