> "we didn't want to pay for more runway". It is a factor (a normal factor of engineering), alongside “there’s no space for more runway” (because you also need

> "we didn't want to pay for more runway". It is a factor (a normal factor of engineering), alongside “there’s no space for more runway” (because you also need blast pads, stopways, clearways, … which are not the runway itself), and also for noise and efficiency concerns a plane is not going to do a full-out takeoff if it doesn’t need to.