Well I got married in 1980 and I thought we did it before I was married as recording was not as wife friendly? Wiki says 81, but that's a couple of years later than memory says!
I'm also going to stand by my accident theory too. There is a big difference between knowing what a control does, and making a great sound. It takes patience, and experimentation. Kraftwerk were very good with synths, but music is not maths and science - you twiddle the knobs, create the sound - then - you might have written down the position of every knob - the Polysix had a memory car - a white piece of shiny surface card with holes for the knobs and switches, so you could use a whiteboard marker to reset them. You know, of course that if you want a certain change then it's a filter, or a pitch tweak on a tuning knob or the ADSR control parameters, but the best sounds are always happy accidents when you mistakenly press or turn something and it's a brilliant effect.