My guess is inflexible deadlines for products and a certain death march culture for meeting them (from what I've heard (third-hand, admittedly) from people who

My guess is inflexible deadlines for products and a certain death march culture for meeting them (from what I've heard (third-hand, admittedly) from people who work there) lead them to be forced to cut corners in some places. On the bright side, Apple does usually eventually fix or replace the hacky solutions. The other side of that is that it sometimes takes years.