I feel this way too, between 2005 and 2010 could no one show me a videon from youtube that I hadn't seen (well maybe but it never happened). it was so "bad" that my friends stoped linking videos because I had seen it already lol. Now is that impossible! Unless it is a person who watch the same youtubers as I do which is mainly makers and creative ppl. This is also why YouTube rewind would never work for me anymore.
I felt that most ppl on the internet was like minded ppl and we had a culture going on, now does it matter more what platform you are on and it feels more like part of your real life. I haven't seen ppl use IRL at all for example and I assume it is because the difference is not as clear anymore, the two world's have mixed together. I remember we talked about our real lifes as if that was a whole different universe almost.