From what I have seen, not that many people have running stuff at the same time. But still, someone with a running stuff might propose to take a coffee break to someone who is not running stuff, and everybody loses (it's a bit like smoking breaks, where smokers tend to synchronize with the heaviest smoker).

The worst part is that some applications are really hard to make faster, for example, going from "slow now" to "faster tomorrow" might necessitate quite a few changes that will be validated at "slow now" speed, for months. So the whole road to a faster tomorrow will be at pilgrimage pace.