I see this one quoted a lot when discussing Lemmy communities migration/consolidation/split.
I don't think it really works that well for forums. Some communities have clearly taken over others (see !onehundredninetysix@lemmy.blahaj.zone vs !196@lemmy.world recently). It's not standards competing, it's people going where the activity happens.
Running 0.18.3 is probably not the sweetest experience nowadays