I wasn't an early adopter of Reddit, or Lemmy, but this sort of has the same issues of momentum as web browsers do. It doesn't matter how they started. Where they are now is the standard, and that's what you have to build to in order to be a viable replacement. With browsers it's the capability to serve pretty much any page with all the bells and whistles, with Reddit/Lemmy it's all the posts, comments, and user base. I think it can happen, but it won't be easy or fast. I'm not worried, though. I think we can rely on spez to send more users this way until a suitable number of users have joined.