What happened to the massive cassette tapes pictured in the above posted RCA promotional film about the ‘revolution in tape?’ Huge consoles seemed to hold four of these biggies which required no threading–imagine! It’s easy to be amused by dead technology but this one is a real puzzler. Did it ever take off at all? Was it such a non-starter that the tapes were all destroyed? Or is there some audio-geek out there who specializes in collecting these massive RCA tapes and perhaps has even restored one of those boss consoles on which to play them? I’m quite certain there is and perhaps he’s even produced a mind-numbingly boring Youtube video (that I just haven’t found yet) demonstrating the process of restoring and playing these things.