There are actually reasons that phones specifically can't last 20 years: We keep changing wireless standards. When it was mandated that all phones in the US mus

There are actually reasons that phones specifically can't last 20 years: We keep changing wireless standards. When it was mandated that all phones in the US must support VoLTE, I had two phones that were instantly turned into e-waste: An aging Xperia XA2 (that I miss dearly) and an ASUS ROG Phone 2 (good riddance) that was only 6 months old. Until we can come up with an energy-efficient and tamper-resistant SDR for phones, this will be the hard limiting factor for useful phone age.