Web 2.0 censors people on Twitter | VS | Web 3.0 won't do this
Web 2.0 servers can fail | VS | Web 3.0 servers won't fail
Web 2.0 reality | VS | Web 3.0 ideals
Circa 2004, when web 2.0 was inspiring similar articles. The ideals were democratisation, participation, bridging the web-user/webmaster dichotomy. A web where everyone could participate fully.Just like today's web 3.0, the web 2.0 concept started from new technologies (ajax, xml, etc.) and it weaved an idealistic roadmap to where these would lead. The participatory, user generated web.
I think idealistic perspectives tend to fall into determinism fallacies. To pick on a cliche, Marx thought of socialism/communism as something that would happen almost inevitably. Web 2.0's technologies did not determine its outcomes. Neither will web 3.0's. It matters who will gain prominence. What their ideas are. What their interests are. What people choose. etc.
I agree that crypto, and other technologies have a lot of positive potential. Potential isn't outcomes though. A web 3.0 Zuckerberg is a scary thought, and I think it's just as likely as a positive outcome.