I'm not going to kid myself into thinking that I don't spend time on social media (hello, Hacker News), but as someone who fits the age range described in the article and doesn't have much of a public account on the platforms listed, the only largest issue I've had is the increasing tendency towards disseminating information only through these channels. Usually I grab someone who does have an account and get them to relay the information, but I'm probably missing things that I don't realize.