Like I said, that was a while ago, If you watch all the follow-up interviews, including the recent TED talk with prior interview with the host, he does mention

Like I said, that was a while ago, If you watch all the follow-up interviews, including the recent TED talk with prior interview with the host, he does mention the process of thinking having solved it, exponential gains, then hitting a ceiling and having to change the approach. The biggest problem I see is not if they will solve it (that's just a question of time), its how they communicate their optimism and "almost there" but always pushing further. That's more than annoying (at best) and contributing extensively to the negativity. I guess they are trying to get people excited, attract talent, etc.