In many ways, images are a big reason why things naturally become inefficient. We are up to a 3x scale factor now and so just by virtue of the higher resolution

In many ways, images are a big reason why things naturally become inefficient. We are up to a 3x scale factor now and so just by virtue of the higher resolution display we are at 3x the pixels for a given image at a given display size. And apps are much more image heavy now with network/cpu speeds improving to support real time image loading/decoding.