The problem there is subbing to all my communities on each instance. It's getting to be a longer and longer schlep through that community list to find the ones I want. Plus I might have conversations going on multiple instances, which I will not remember to check on or even which instances I have a conversation going in.
It’s a bit of a pain but not the end of the world. I switched my main account on Reddit after 8 years. It didn’t take more than an hour to subscribe to all my subs again. And there are fewer communities on lemmy (if you discount the multiples).