>For computers, Musk said, using large numbers of small computers ends up being a more efficient, smarter, and faster approach than using a few larger, more powerful computers.

I always figured, in theory, a super-super-powerful single threaded single processor would out compete the multi-threaded multi processor design on efficiency, because of the hardware and software inefficiencies in inter processor hardware connections and communication. In practice, I suppose there is always a physical limit on the total capacity of low latency addressable ram and storage you can manage to shove into an architecture.