Something else that has largely disappeared is that there used to be a fair amount of organization of content, whereas now a lot of content is just thrown into a big pile and the user is left to go fishing on their own with search engines, whose ability to search seems to be declining (ie: Google often seems to no longer support mandatory include/exclude search parameters). Generally speaking, the result seems to be decreasing order and increasing chaos.

Of course, the massive volume of content creates a fundamental problem, but user curation & categorization on sites like Youtube would be possible, were Google to provide the software support so people could do that. Whether this and similar decisions are deliberate or accidental is likely one of those things that we will never know.