Well, you came out with a great example. Cars are one product with a very visible evolution, and expensive enough for slowing this evolution down so it could be documented. How much are the 1915 cars better than the 1900 ones? I&#x27;d venture a guess at the hundreds of times.<p>Film cameras are at the cheap&#x2F;fast evolving end, so I wouldn&#x27;t expect to see most of the in lab models documented. Yet, the first released ones were very reliable - I doubt the first prototyped ones were so.<p>Thermal machines and watches were two examples of products that were slowed down by economical factors. Different economical factors than semiconductors, so they didn&#x27;t got that the smooth exponential development.