The Fediverse is rather different. I'm sure there will develop some sort of sign posting system to point out where to go but by its very nature, it will be subjective. Perhaps some sort of vivacity score could be used to judge how alive a community is and some way to show all communities across all instances in a say top 10 listing. In time communities with the same broad focus will develop a particular or set of focuses (foci, focae - not for me). Time will tell.

Lemmy is different to the walled gardens and it needs to mature and develop its own way of doing things. I love the fact that the largest instance went down with a bang for a while and the rest carried on fine. I feel for lemmy.world residents and admins - I'm a sysadmin myself. However that demonstrates the sheer power of the fediverse. I will be spinning up an instance eventually, once I've got the hang of using it and I run some quite important stuff at work.

Tools and memes will develop over time but make no mistake, the fediverse has hit its teens in life. What sort of adult we get will be interesting. We do need to keep it out of the hands of a single authority whilst still allowing civilized discussion, for a given value of civilized. Instances can refuse to peer with others so we can gradually develop networks that work for subsets of the human race. The tricky bit is enabling this to happen within earthly laws and boundaries. Governments hate decentralization for obvious reasons. Instead of Messrs Apple, Google, MS etc they potentially have to deal with me and you and the other n billion people on the planet!