I gotta say, I was among the Twitter Marxist crowd around 3 years ago,and yeah most are just talk, yap and argue, although there were some genuinely making something good, such as a community library or benches for instance. I’d say none of them would switch to the fediverse in any actual capacity, because most just believe in the asthetics and being in the community of like-minded people, instead of actually following the values they allegedly preach, but really don’t even know.