But wouldn’t it be great if the knitting community (for example) on beehaw.org, lemmy.ml, lemmy.world and feddit.de would be merged for me into one entity for a better browsing experience?
Why wouldn’t they merge on one instance? Seems easier, and can be done today compared to having to ask the developers to implement a complex feature.
I just had an issue that might be interesting in your case. You can read it up on !newcommunities@lemmy.world, but long story short, the mod of a community wasn’t happy with the way I wanted to bring some meta discussion into the community.
The main difference in this kind of situation between Lemmy and Reddit is that