I remember people saying this about YouTube and Twitter. Yet it doesn't seem to have worked out despite both having several competent alternatives.
EDIT : Also, interesting that the American right has moved from Twitter to not Mastodon, but to Parler instead :
https://news.ycombinator.com/item?id=25097145
I wonder why ? Mastodon presenting itself as being too left-wing ?
(Though make no mistake, a lot of the American right is 'conservative' only in name, and is instead wildly anti-conservative both in their speech as well as in their deeds.)
https://www.theverge.com/2019/7/12/20691957/mastodon-decentr...