So if theoretically you ban addictive social media platforms and prevent the formation of any platform with more than a million users, then yes, teenagers will go where their peers go, but that will not necessarily be where teenagers on the other side of the country go. It will also not necessarily be a destructive algorithm-oriented social network designed to maximize time spent viewing ads.

My friend group had a phpBB forum back in the day. I spent hours on there because I liked hanging out with that group of friends, not because it was profitable for some megacorp.