Parallelism of software effort is very very expensive not just in terms of people but in terms of communication. Unless you mean non-brute force, where you spl

Parallelism of software effort is very very expensive not just in terms of people but in terms of communication. Unless you mean non-brute force, where you split the problem into complete awesome abstractions so team a need not talk to team b and developer a need not worry about the big picture, but just this nice little problem. But that takes a bit of higher latency where you have to walk around and think in a relaxed and open fashion.