I’ve seen some people talking about how the lemmy developers are planning for the ability to “group” communities (of the same name or something like that) on different instances together.
I’m taking this as those communities then forming one community that doesn’t have to rely on a single instance’s community to “survive”.
Haven’t put too much thought into this but I think that would at least lessen that problem, especially for new niche subjects popping up. The difficulty for existing niche communities starting anew here will probably remain but I’m hopeful for the future.