50 years ago, people, on average, knew a lot more about maintaining cars. They had to since they broke down far more often.
30 years ago, people knew a lot more about maintaining personal computers.
Knowing more things is always good, but there's finite time in which to learn things so you have to choose between them, as you say, it seems pretty rational to select the more valuable ones.
30 years ago, people knew a lot more about maintaining personal computers.
Knowing more things is always good, but there's finite time in which to learn things so you have to choose between them, as you say, it seems pretty rational to select the more valuable ones.