100% this. There are tens of thousands, if not 100's of thousands of people in the fediverse now. That is PLENTY to get these communities going. They will only continue to grow. And as people have choice, and they see this as a better platform than reddit (which it is, and will become even more so in the future), people will slowly stop going to reddit, and starting going here. Reddit won't die, not overnight. But it's peaked. And it's only downhill for reddit from here on out.