The sad but inevitable movement from open web to a balkanised web. Much of human interaction, both good and bad, have moved into closed facebook groups, discord, wechat and telegram channels beyond the reach of the search engines. Youtube just happens to exist in the present twilight zone between the old internet and new internet.

To me, the seminal event marking the transition has to be IMDB shutting its forums. Public discussion and discourse is now seen more as a liability than something of value.