> odds are Twitter is probably just fine for now as there's no actual alternative.

Just because there isn't a direct alternative doesn't mean Twitter's future is bright. Twitter users can just quit Twitter without signing up for a new social media site. They can use other social media more, or find something else to do with their time.

Keep in mind, a vast majority of Twitter users don't actually post. To these users, Twitter is just a source of entertainment. And if these users aren't getting enough entertainment, they'll just stop using the site. Maybe not immediately, and maybe not in an organized fashion. But people can and do change their social media habits, and there's nothing forcing people to stick with Twitter.

The advertiser exodus (already well underway) is a far bigger threat to Twitter than a user exodus. The subscription model is dead on arrival.

There's plenty of options if you want a forum without "corporate ESG posing" - 4chan et al. They just don't make money, or interest the majority of people.