I think we can all agree that the keyboard isn't the limiting factor here. Individual programmers at their own keyboards can all focus on separate problems. Tw

I think we can all agree that the keyboard isn't the limiting factor here. Individual programmers at their own keyboards can all focus on separate problems. Two (or more) programmers with a single keyboard can only focus on a single problem at a time, but they get the experience and perspective of multiple developers. It's really just a matter of breadth of focus vs depth of focus. At a certain point adding more developers won't help and it will end up wasting resources. This may be as soon as you add a second developer, or maybe after you add 6 developers.