To me, a fascinating angle is when the electronics obsolescence curve runs into the mechanical one. Cars are filled with that kind of thing, but two more interesting ones are products like sewing machines and power tools. Both used to be overdesigned, now they have have additional features and underdesign enabled by built-in microcontrollers. In drills, for instance, it'll back off on the power where an earlier model needed to be able to handle an animal wielding it.