Cars in 1920 were still relatively new and were undergoing massive architectural change as infrastructure, technology, and consumer behaviors developed. On the

Cars in 1920 were still relatively new and were undergoing massive architectural change as infrastructure, technology, and consumer behaviors developed. On the flip side of that, in areas where the technology and behaviors are mature, it is totally plausible to achieve 100 year lifespans. As an example, I have some woodworking planes that are approaching 100 years which are pretty much the same as what you can buy new today. As another extreme example, the U2 and B-52 planes are over 65 years old and still in active use as they receive updates to meet changes in their customers needs.