I remember "Bitches Brew" being released sort of in the middle of the quad rage.
A friend once gave me a quad reel to reel of DSOTM because he couldn't play it on his machine without altering the deck. And/Or he had to have a special receiver to play it.
I could play it on my Studer after some manipulation, but the novelty wore off really fast.
I think everyone played around with quad for a while. I bought a Kenny Loggins tape for a girlfriend and she hated it! She did not want to feel surrounded by anything.

I had a room set up with my own version of "surround" in the late '70s. I had two stereo systems set up crisscrossed with a "difference" speaker set between each stereo pair. The four "difference tracks" were wired between the positives of the main tracks to create the difference signal.
It actually sounded pretty good, but again, the novelty wore off quickly.
I had a show to do once with a "Healer" from Mexico who had to be in the middle of the room, surrounded by his audience. No way to fly anything in those days in a low ceiling convention hall.
The sound system had to go in the corners of the room, facing the microphones. A perfect recipe for massive feedback all day long, but I managed.
I basically used my experimental funtime knowledge gained from that household play to set the sound reinforcement system up for him the exact same way, using eight columns of speakers evenly spaced around the perimeter. Yes, I measured! It was a square convention hall room, but I made a circle of sound with him in the middle.
It actually worked great! He could move anywhere within about a forty foot radius, which included his entire audience in the many circles of seats, and I had no feedback from facing all the eight speakers directly toward the center where the main microphones were.
The real secret was that I used a stereo microphone for him and re-wired the stereo sides out of phase internally. Any sound from close proximity made one signal, but any sound from about eight feet away arrived out of phase to the sides of the stereo pick up mic. No feedback!
A lot more trouble, but it worked! And he healed many that day!