I generally scroll through either local or everything sorted by "New Comments". That's why I'm replying to this two month old post, because someone else did, so it rose to the top. Feels like a combination of Reddit and a classic forum where you'd have posts that would get bumped by activity.

I subscribe to communities on multiple instances. My main activity is on our niche instance. If people are happy signing up at lemmy.world and limiting themselves to the communities available there, I see nothing wrong with that.

That being said, I think if you search lemmy.world for wetshaving, as an example, our instance does show up in the results because there is federated cross-over (for lack of a better term).

I'd argue one of the most pressing concerns right now is the lack of migration tools

Currently you can't just create an account on instance X and move to Y. You need to create a new account. Eventually if we get the functionality to migrate from one place to another, people will be able to spread out across the fediverse and the risk of a single big server going belly up reduced.

From a technical standpoint if one instance gets defederated from other instances, all the users on that instance are stuffed. Their content won't appear in the wider fediverse (so less engagement)