You probably want to start here:
Exactly!
Also true…
I do think it’s worth taking the time and preserve older media formats in archives, though. Holding onto old cylinder phonographs, for example, has allowed for the LoC to preserve records that might have otherwise been lost. Although in some cases, they often had to use computers to figure out ways to lift the sound, because playing back some of the old wax or tin cylinder phonographs would have just destroyed them. Still, being able to play the original formats can provide valuable historical details that a digital format might miss. It does depend on what you’re looking to understand of course…