All of us leaving Twitter would also have a bunch of other beneficial effects. It would remove Twitter's hold over us - they are, after all, a totalitarian organisation run by @jack, just like every other multinational corporation. This would be a useful example to those many corporations (who consistently abuse their power and exploit their customers and even entire governments) that the people can actually get fed up... and hand their corporate asses to them.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!