That's when their needs start getting more expensive, phones, computers, transport, outgrowing clothes, and many will only have part-time minimum wage work for 15/16 -> 25/26. In many countries there's now record numbers of people in their 20s and 30s moving back in with their parents because they still can't afford to live independently.

Big tech needs to be accountable for enabling malignant content to spread, profiting from scam apps, selling counterfeit goods etc, instead of this carte blanche they somehow wield.