On Mastodon I'm usually talking about writing. On Twitter the conversation is dominated by the disordered Owner and which banned Sociopath he'll bring back next and how he'll recoup on his investment.
All the people doom scrolling on Twitter are putting money in his pocket. They're funding what he's doing to that platform.
Whereas here we can do something new that is ours.
I think as more journalists and academics set up stalls here then it'll be possible for activists and whistle blowers to use Mastodon to get the word out. A lot of the platform effect they had on Twitter was that it was an information pipeline to the world's broader media outlets. It was never just about Twitter's user base.
Mastodon also tends to punch above its weight. When it hits 10 to 20 million users I think it will surprise people at how much reach it develops.