This relativism applies to some extent to pure entertainment activities. What is worthwhile, trendy, in-group (or whatever) does vary enormously by region, age

This relativism applies to some extent to pure entertainment activities. What is worthwhile, trendy, in-group (or whatever) does vary enormously by region, age group etc. But these platforms are now for most people "all-there-is". They have replaced effectively any other source of information. What can go wrong when algorithmically titillated echo chambers shape people's mental horizons and behavior? We are increasingly finding out.