We may be thinking of different populations of users. The folks using Lemmy right now don’t really need much help to get what they want out of it. But if the fediverse is to grow, even if it never hits Reddit/Facebook/etc numbers, its developers should look at ways to decrease friction to getting the best experience.
And to be clear, I did not mean to argue that redundant communities are a problem. I can just see potential benefits of allowing cross-instance merger of communities IF the leaders of those communities decide they want to.
There undoubtedly IS strength in redundant communities, just as there is with all the different instances to choose from. One mod, one admin, one hardware failure or seized server, etc cannot just shut things down. Plus competition is good. There can be a natural selection process to determine over time which community is the best run.
But thanks to the network effect, there is also a first mover advantage, and an inertia to whichever community gets the most users at the beginning, since many people will just sub to the one or two most active communities on a subject. It would be interesting too see how, and IF, such a “merge communities” feature would be used by like-minded communities/mods. That kind of feature would/should be low priority in these early days though.
Over here on Memmy you can fullscreen and resize it pretty seamlessly.