The beauty of it is that "Lemmy" doesn't have to get big all by itself.
I'm commenting this from kbin.social.
As more people join the fediverse we are going to see more niche instances of lemmy, kbin, all kinds of things. And those niche communities are going to create niche content.
I had never modded before in my life but when I joined the fediverse I made a community for what I want to see, because the fediverse is exciting and I want to be part of what we are doing here. I bet lots of people feel like this!