RCA's living stereo, along with Everest, Mercury living presence, Westminster and a few others I probably can't recall were the standard of the day for the "golden age" of stereo in the 1950s and early 1960s. These were all recorded with very pure-sounding analog vacuum tube equipment, some on 35mm magnetic film, which is wider and moves faster than the standard analog magnetic tape.

Their sound quality has never since since been equalled with the exception of those recordings which use either vintage gear from that era (I do this for some of my recording signal chain), or use modern reproductions of vintage gear. Additionally there are many modern designs which use vacuum tube technology, and today's recording engineers value the sound of this highly. The microphones from this era fetch unreal amounts of money.

Jazz recordings from this era in particular benefit from the extremely "organic" sound of the vacuum tube gear and analog signal path.