Electronics, basic stuff that it.

[Nick]

In my post I didn't mention valves at all. What I did say was that a little bit of the developments should be mentioned and possibly a little bit of familiarsation would be helpful.
We may use Digital but this is very much an analogue existence.

It was Trevor who mentioned valves, I did mention that analogue is still taught (as is materials science, essential stuff), just that analogue is no longer as important as it once was.

Generally, the analogue part of a system is nowadays mostly concerned with signal conditioning pre ADC or post DAC - that includes digital amps and SDR. The heavy lifting these days is mostly digital.