Knowledge can be lost. There is a stark difference between using a tool and mastering a tool. It's even harder for theoretical knowledge. Don't use it, lose it.

Knowledge can be lost. There is a stark difference between using a tool and mastering a tool. It's even harder for theoretical knowledge. Don't use it, lose it. Look at the US space program for example. It took them 12 years from the first man in space to go to the moon. Nowadays Space X, Blue Origin etc. seem to have to re-learn everthing and edge themselves slowly towards launching manned missions. They very likely have the books about space flight but not much experience. I'm not saying that young people don't know assembly and C. What I'm saying is that most younger people don't need assembly and C, so they are a lot less proficient in it. Hardware has become so fast, it doesn't matter that JavaScript is 20x times slower, so people nowadays write entire desktop programs in JavaScript that are slow on not-cutting-edge hardware and have bad OS integration.