We used to think that if we had user-generated content, we would all be immune to governments, corporations and other powerful actors spreading propaganda because we would get our information from each other, not them.
Turns out: governments, corporations, other powerful actors are perfectly capable of paying "users" to "generate content" and not even disclose this.
The Internet used to be an exciting development, now it's just like, yeah it exists, so what.
I am too young for that, but I do remember discovering the concept of wikis and finding it amazing that websites could now be written by their audience.
A fairly dead concept by now, nowadays the entire rest of the Internet is more interesting than wikis.