A friend's father back in the early 90s was convinced that analogue computers were going to come back and kick the asses of these newfangled digital pretenders

A friend's father back in the early 90s was convinced that analogue computers were going to come back and kick the asses of these newfangled digital pretenders :) He was a little strange, but I loved seeing his workshop and attempts at building such computers. It's a pity I'm not in touch any more, I would like to learn a bit more about what he was actually doing and if it was effective at all.