I was actually under the impression that this is more or less what they do, but that not everything can be recovered this way, in particular the various materials that get encased in epoxy for ease of handling, like most of electronic components.

And when you look at the semiconductors, the chips and the display, the input materials to most of it aren't really that special, as I understand, but turning the sand into thinking machines takes clean rooms, factories, transportation and processing that add up to huge amounts of energy - in some cases as much as will be used to power the device in its lifetime, I've heard. And no recycling technique is ever going to bring the embodied energy back.