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The silver lining here is that both of them are wholeheartedly recommending lemmy as the alternative, so it should provide an extra push to those on the fence about migrating
As were seeing with Lemmy.world and Lemmy.ml getting ddos attacked, having the biggest most active communities centralized on such large instances hurts everyone whose federated with them
Also, lemmy.world admin hasn't taken the strongest stance against Meta federation. So depending on their decision in the future another migration of communities might be called for. It's a good reason to spread out so leaving an instance doesn't mean losing a bulk of your communities like with reddit.