It is very heart lifting to see that most of these technological inventions took 4 to 6 years to perfect. We’ve just past year 3 of our own novel electronics device and although it works, it doesn’t work well yet.
Some took a lot longer than 4 to 6 years. It was many, many years before the transistor reached a point where they replaced vacuum tubes as final amplifiers in transmitters with say, 100 watts output power and higher.