Probably less. The average electrical engineer working during the 60s probably had to have a far better handle on characteristic curves of tubes and transistors

Probably less. The average electrical engineer working during the 60s probably had to have a far better handle on characteristic curves of tubes and transistors, and therefore physics. Hell, the Apollo team hand-calculated the diffeq's of the moon missions! These days, you are far more likely to rely on and write software for machines that involves very little direct knowledge of math and science. As the tools integrate more of human knowledge, I would expect this trend to continue.