I think you're wrong. Declining consumption consensus is just one piece of evidence, and even that is far stronger than you seem to think, and it's NOT just my personal experience (if anything my TV tastes are hangover-Cronkite basic)
Or take something as simple as work schedules. From regimented 9-5 patterns across the economy to heavily flexwork/remote/sporadic patterns. The evidence is all over the place. Doesn't mean each is unique. Still patterns of imitation/convergence. But local+online, not global.