There's one question I saw on Stack Overflow a while back that irritated me. If you copied and pasted the literal question directly into Google, the top hit was directly to the canonical documentation, where you could just scroll down to the clearly marked heading, and copy and paste the sample code and have it work straight away.
When I pointed this out, I was berated for not understanding that Stack Overflow is trying to become the canonical source. Sure enough, a few weeks later, the top hit on Google no longer pointed at the official documentation. It pointed at that same Stack Overflow question, with a half-assed answer that only gave a fraction of the information the real documentation did.
I appreciate Stack Overflow for its strengths, but it's harmful too. Being able to go directly to the canonical source of information for a product and do your job without anybody spoon-feeding everything to you is a vital developer skill, and I'm seeing more and more people who won't bother to lift a finger unless somebody does half their work for them. This project seems like it will push the developer community much further down this path.