I believe more and more people will escape to lemmy sooner or later, and I already see 3 different communities for the same thing (selfhosted) here on lemmy. Time will tell which one will be the most active, but lets assume all of them will be equally active and the desire emerges to combine the two communities about the same thing, is that something possible or intended to be possible with federated services?
Eh, reddit really isn’t much better in this department. It’s not uncommon for multiple subs to exist for the same userbase (r/memes vs r/dankmemes, r/christian vs r/truechristian). Over time users figure out which is which, which is the main one, and which is for them
True, but they are all with different names, and they are not completely the same (as in different rules, more specific topic vs general topic, etc). But on Lemmy there is a possibility that two communities having the same exact topic and name for example !technology@beehaw.org and !technology@lemmy.ml, they are both discussing technology (and not any specific difference between them).