If, indeed, I was put in the position of only being allowed to keep 5 record albums, I would think that most all of the contributors collections would be adequately satisfying. I suspect that the limitation of recorded music would encourage me to make my own music, and, depending on whether the limitation effected others, could quite possibly lead me to engage in more participatory forms of enjoying music.
I'm not so sure that the last seven decades have been "the best ever." They have certainly been unique in that recorded music has been available, so you don't have to make it yourself or wait for a concert. Frankly, I enjoy live music, or even better, playing it myself more than listening to my stereo.
Could be a good thing!