So if I understand this right, you pick a server and your server account can post on that server and any servers that that server federates with.
So what happens to your account if the server you joined goes down? Yes, you could always create a new account somewhere else, but you lose all your followed communities and post and comment histories as well.
Anyone can start a lemmy instance on their Raspberry micro computer, personal laptop, dedicated home server, script-compatible NAS’es and on and on.
But most Lemmy instances are hosted on VPS’s for stability and scaleability.
This is an issue I’ve talked about before with the general response of “It’ll sort itself out”. Now, a few years later it’s total fragmentation and a budding centralization with the new “megainstances”.
I envision special interest servers that are monolithic in community nature, dominating certain topics. Unless there’s some sort of mitigation, like a federated subscription list+multi"reddits" or something similar.
I suppose, the more I think about it, the same is true right now, except instead of a single instance having a monopoly on a topic, its reddit. I totally agree though its a valid concern, and I think something like multi reddits is the answer. If I can just subscribe to all instances that are tagged under a certain topic, then all those other instances can host content and still get visibility, instead of being crushed by those mega instances.