We must admit however, that a car is a limited purpouse machine, very unlike a computer. Here we are looking at engines increasing in power and efficiency with no end in sight. Engines of jet planes are more powerful than ever, but don't tell a jet engine designer that they have reached their limit and don't need to make them more powerful. In one short century, we have gone from Wright Brothers' weak little prop. Computing power has the added advantage of not being as physically limited.
Computer technology can progress far faster than mechanical.