I don't recall feeling overly impressed with content on Mastodon, it's just social media, but with a small userbase, I'm guessing more tech-saavy. I think what ultimately "wins" in the social media space is wherever "everybody" ends up going. Right now, Bluesky seems to have the momentum going for it as people are flocking to it in droves, but it's hard to tell how sustainable it is long-term as the hype settles down. Right now everybody is excited and seems like they're trying to make it a positive, creative, liberal space, but eventually trolls will start invading the space and it'll be like every other social media site unless it's somehow structured in a way as to avoid that.