It does indeed look like the social media landscape is fracturing into separate tribes. Whether this is good, who knows.
One quote from the article is this: “X for the rightwing and the raging; centrists and policy nerds on Bluesky; people who hate politics on Threads or Instagram; Gen Z on TikTok; boomers on Facebook”.
Mastodon has a decent number of users among tech savy nerds.