Well, that’s the point of the Fediverse, you don’t really have to choose which one will ‘last longer’ you choose which one suits you. All the Communities / Magazines on Lemmy & Kbin do interact with each other, it just depends on what sort of look, feel, and Instance you prefer. The point of a decentralized system is not to have one centralized point or even software to access it, you can choose what you prefer. Like I’ve been preferring Kbin over anything else in the Fediverse lately.