I think you could be underestimating it. I’d guess there’s a simmering level of interest among a lot of people, especially those more conscious of moving away from big tech / corporate platforms. FWIW, this tipped me over the edge into setting up a Mastodon account — it was very painless. We’ll see whether I actually start using Mastodon, but it’s a start.
They have grown from 300K monthly active users to 2.5M in December. Nothing compared to social networks at large, crazy numbers compared to the omg.lol user base.