Can Lemmy have distributed communities

I was thinking about this in regards to all the “defederation” posts.

Let’s say you spin up a server and over night it gets super popular and grows enormous. Now your yearly expenses shoot up and you’re forced to either look for a new host or shut down.

Now what if instead, you could get a few other people to spin up more small instances and distribute parts of your biggest communities to them, however the users don’t notice because The communities are looking across instances instead of within their home instance?

That’s the idea at least. This would allow for many things but most importantly, it would make things a bit more manageable. Thoughts?