Fediverse

Too much growth for a single instance can be a bad thing. Lemmy instances are typically run by a single administrator at their own expense. These are not necessarily big powerful servers with big bandwidth. I would guess most are being hosted by VPS providers.

So you may be better off on a smaller instance with a server under less load. For example lemmy.ml is pretty much on its knees right now. You may have performance issues using them as your login instance.

There's also bandwidth performance to consider, in other words you may have latency issues using an overseas instance in lieu of one local to your region.

The advantage of a decentralized system is you have options. I actually have a couple good instances I can log into. If one goes down or has some kind of issue, I can jump onto another one.