> I suspect this is also why skeuomorphic design lost the evolutionary race - everything needs to be tweaked and aligned and optimized ad hoc. If you want to reorganize the interface, it means potentially recreating a lot of assets. Flat design is interchangeable and modular.

Another way to say this is: cost cutting. We gave up superior usability so software could be made more cheaply. See also: replacing buttons and knobs in cars with a big iPad.