I’m no great fan of the ubiquity of the CAP theorem – it’s a solid impossibility result which appeals to the theorist in me, but it doesn’t capture every fundamental tension in a distributed system. For example: we make our systems distributed across more than one machine usually for reasons of performance and to eliminate a single point of failure. Neither of these motivations are captured verbatim by the CAP theorem. There’s more to designing distributed systems!
In this, I agree with Stonebraker; it’s the erroneous representation of ‘partition tolerance’ that I found very strange. I’ve been a good deal more forceful in private about this than I have in public 🙂