For me its already a huge success that Lemmy got where it is today, with over 50k users. If you had told me that a few months ago, I hardly would have believed it. When I started working on Lemmy, there were a couple dozen active users at most, yet the project didnt die. Instead it kept growing and growing steadily. So I think it will keep growing, and there will be more improvements which make Lemmy more accessible for normal users.