Yeah before the reddit migration the top instances were lemmygrad and a far more stalinist friendly lemmy.ml . Beehaw was also there but beehaw didnt have open registration and the process also became bugged out around the time the expansion happened so people would write their application to join and get no notifications or anything that they were in. Also beehaw manually reviewed the accounts at the time so it was a slow process.
Other large instances also didnt want to become the largest one while .world wanted to grow at all costs. With open registration and didnt even require emails at first(which honestly reddit didnt either for a while, but reddit had better mod tools for its time)
Yeah and in addition to that the overall “be(e) nice” rule means that people are generally just a lot more pleasant to be around and less abrasive than what I see in some of the other larger instances.
Only issue is I recently opened another account because theyre leaving lemmy eventually and currently my posts dont federate and all my subscriptions are pending.