I think a big issue with Lemmy is that I think there's a lot of people who become disillusioned with it, just like how a lot of users became disillusioned with Reddit. When users join this site, they'll immediately notice that there's nothing outside of extremist politics, privacy focused tech talk, and shitposting. Unless they're interested in those topics specifically, a lot of people would rather either just go back to Reddit where there are active communities outside of these topics or find another, more active platform. A lot of people thought that Voat was going to rival Reddit when launched, but it ended up being a niche hub for extremist politics, tech talk, and shitposting until it shutdown. Now Lemmy is definitely better than Voat in every aspect, but I'm not sure how it can over come that big hump that will allow to appeal to general public