People downplay the "fringe" aspect, but it istheo most common complaint I hear, that Mastodon/Lemmy are the "crazy left wing" versions of Twitter/Reddit. And while I'm not necessarily right-wing myself, as someone who's not far-left, in any sort of political or social discussion, yeah I kinda see it. Non "fringe" people don't want to be on a platform where anything not "fringe" gets flamed/downvoted to oblivion, even if it's not technically a rule that the communities are "fringe" it can feel like an unwritten rule. Then if anyone tries making a not de facto "fringe" instance everyone else defederates from it, effectively killing it before it can get off the ground. Let's be real, there are plenty of valid reasons to defederate from Threads, but a common one I do hear is because most Threads users aren't "fringe" enough. That's not going to attract a lot of people to Mastodon or Lemmy itself.