I'm new here, so maybe I'm missing something, but how is this comment a substantial contribution? Are you calling him a hypocrite?
A specialist in the field changed their mind after 12 years? The inputs were much different 12 years ago. Brink of invading a country, still in a meh state after the dot bomb...
A wise person, given sufficient evidence to do so, will change their mind.
In the new article he clearly states reasons for having this new opinion.
Things change.