we have "sub-lemmys" but what we are missing for lack of a better term is "dom-lemmys", hear me out
What we're really lacking on the ui end is a way to see groups of identical communities that are on different federated platforms. Hence the idea of a dom-lemmy. The way it would work is lets say you search for a cat community called "cats", there's at least dozens of them out there already. Instead it would return the cats dom-lemmy, with the option to either drill down to a specific instance, or to merge all sub-lemmys called cats into a single view
I have suggested this to a couple of app developers. Aggregating sub forums will be a huge perk if feasible in the near future. I'd like to have all my subscriptions from different platforms with the same or similar name under one page. Or at least allow me to chose which forums aggregate within a custom category. It would make the fediverse much easier to navigate especially for those who are less technically literate.
And easier for those who are technically literate too. I know how to repair my bicycle. It doesn't mean I want to do it every time I'm trying to enjoy a bike ride.