Mainly because they can only hold a few minutes of audio on both aspect, they introduced the singles field that we know right now. Vintage 45s might be value 1000s of dollars, like these 4 legendary discs are. on their Blue­hen Records im­print. (Cu­ri­ous­ly, RCA has not sub­mit­ted this https://milownebt.eedblog.com/40317179/not-known-facts-about-pllatinum-record-awards