Even without planned obsolescence, it's still difficult to make things that have value thirty years from now. Even infrastructure has issues on this timescale:

Even without planned obsolescence, it's still difficult to make things that have value thirty years from now. Even infrastructure has issues on this timescale: nuclear reactors are designed to function for forty years with maintenance, and roads something like 26 years before re-doing the asphalt. And there's only so much infrastructure that's worth building, based off the intensity of economic activity that it facilitates.