I like this too. Having spent a bit of time flitting around the fediverse, I believe that we're going to see local instances with local content, and the larger places with more global.
And honestly? I think it's quite a healthy way to do things.
If you live in a country of 5 million people, instead of being fractured across 5 big instances, someone can put all the local stuff in a local lemmy for local people (we'll have no trouble here). If the site admin has to pack it in one day, it's a far less daunting task to transplant, than a megasite deciding to suddenly go public.
Then when you want to do more global things, you go to a global/US instance.