I heard “Switched-on Bach” in SQ and was hooked. Bought the decoder, bought an amp, got a pair of speakers for the rears. Spent all I had, not unusual for that time of my life. Then came QS, which confused me, although it was still cool through my SQ decoder. Then came CD-4, which pretty much required a whole new system, and I turned my back on it. I was an electronics technician at the time, and certainly geeky enough to think the gear was interesting, but having three different setups just wasn’t something I could handle. After all, I wanted to keep dating girls.
I also seem to recall that some stores treated quads like they had a disease, quarantining them into an “audiophile” section where they also had direct-to-disc, half-speed-mastered, virgin vinyl and other infectious elements, although that wasn’t universally so.
I’m not surprised the non-technical public was confused to the point of ignoring the whole thing. These days, in my dotage, I don’t need to date, I have the means to obtain the hardware, but my hearing ain’t what it used to was.