To support decentralization and spread, should lemmy.world close registration at some point to prevent a performance overload due to too many users? Of course, if registration is disabled, there could be a hint placed somewhere near that from other instances you can interact with content on lemmy.world just like you had registered on it. There could be a link to join-lemmys instance overview.
Some of the issues might be on the software side, so it’ll take some time until it can scale to more hardware resources. But yeah, I agree! What scares me more is the monetization path. Servers can become a really expensive.