I'm not a teen (22yo) and I've deleted all my social media presence years ago. Now, I only use text to schedule in person meetings. I am less stressed, more productive and healthier.
I did the same than him, and I had to recreate a facebook account.
Reason n°1 were for group project : 90% of the people seems to have forgotten how email is working
Reason n°2 were for the associations i am part of.
But I definitely missed last year (scholastically), and i feel that all the social network are addictive, so I am trying to avoid them (I only use Facebook through Messenger, I don't have Twitter, but it never took off in my country, Snapchat). I also don't use Youtube, because it is for me the television of the 21st century.
I am going back to college in 2 weeks, and I am slowly deleting all of my last online accounts.