I agree it has a lot to do with demand, but...
It also has a lot to do with the engineers today vs. in the past. Today, the best engineers are in semiconductors/solid state designs because that's where the money is. In the past, the state of the art was vacuum tube technology, so the best and brightest worked in those fields and the fields that supported them.
It also has a lot to do with the engineers today vs. in the past. Today, the best engineers are in semiconductors/solid state designs because that's where the money is. In the past, the state of the art was vacuum tube technology, so the best and brightest worked in those fields and the fields that supported them.