But not every instance has the same governance as lemmy.zip.
Agreed
Would you also be fine with some community becoming de facto reference on beehaw.org or hexbear.net or lemmy.world?
No, and that's why I listed SJW and lemm.ee in my OP (to be honest, I should probably change LW to lemmy.zip)
Beehaw is too deferated indeed.
Hexbear comes with their own specific stance.
LW, I feel like they are okay for now. The major issue I see with them is the federation with Threads, but that can always change (and probably will if we get millions of trolls at once)
I guess my idea would be to have a subset of instances that are compatible, rules and federation wise (lemmy.zip, lemm.ee, SJW, Reddthat.com), and spread communities among them, with one reference community on one single instance.
LW centralization is an issue on its own, but that's the subject of another thread already.