I studied physics and computer science, so sadly im not too familiar with electronics. My question is kind of weird but hear me out:
After reading a bit about (simple) electronic circuits, I got the feeling that in every large electronic device that uses microcontrollers or computers, the endgoal of all the electronic components is always to just supply the computer with suitable power. Is this correct?
I guess you could rephrase the question like this: Is there ever a situation where a signal is taken out of a computer to process it with another circuit (in an analog way) and then fed back into the computer? (maybe differentiate, integrate or filter a signal?)
Or rephrase it like this: If we only had logic gates as fundamental building blocks (not resistors, capacitors, inductors...) and magic black boxes that could always supply our microcontrollers and computers with suitable power, is there anything that we could not do that we do with our circuits today?