> This is a rather personal take on any versioning on the web. Web 2.0 was "cool" because it was a change to something beautifully different.

Having been though the whole v2.0 shebang, it was widely uncool and most derided it as a pure marketing play. I mean the term was coined to sell tickets to a conference.

No one could agree at the time about what v2.0 actually was in a way which is not dissimilar to how web3 is currently being pushed. For exemple, you think that RIA applications in Flash are part of Web 2.0. I would definitely say it's not.