I dont dare bring tape into this, but this is wildly poor information. Tape absolutely degrades over time, but the real problem is the chemical compounds breaking down that hold the oxide to the backer. During the process of making something like, a rock record, the length of tape that that 3 minute song takes up will get dragged back and forth across heads and guides hundreds and hundreds and hundreds and hundreds and hundreds of times. The mixed master on the other hand is never played nearly (as in not remotely nearly) as much, you print it, it gets listened to, a mastering engineer plays it a few times and that it. In a professional recording situation if you are having problems with signal degradation you have bad tape (which happens) or something else is the problem. Beatles masters are still playable, its an excellent long term storage medium. There are warehouses of perfectly playable tape (without baking) that completely outlasted the electronics of some of the professional decks they were recorded on. Try dealing with a scully 280 today, no thanks.