Stick that digital file on your storage area in the cloud, and it will be there on your phone, or your smarty watch, or the embedded chip in your head whenever you need it in 20 years. I have wave files from the 1990s that I captured from my cassette deck via my Soundblaster card. My 486 computer still works, the files are still there. One of the belts on the cassette deck has turned to tar, and it will probably cost at least $100 just to get it fixed.
The reel to reel tapes that I had in a box in the basement were sitting in 18 inches of water in 2009. They are now in the landfill. I don't have any backups for them. The ~100 albums are still in boxes, but with no covers. The 486 computer that was in the basement still works even though it was sitting on the floor. You can see it in the attached picture. All the files, are still intact, and are backed up on a hard drive and a USB flash drive in a fireproof safe.
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There are people who are tossing reels of Ampex tape after baking and hopefully being transferred to digital. Sticky Shed has made it unusable.
The supposed permanence of cassettes and tape in general is a joke. Ask the people who had master tapes in storage at Universal Studio's warehouse that were destroyed in a fire in 2008.
However,
Universal executives initially said the fire destroyed 40,000 to 50,000 archived digital video and film copies of Universal movies and TV shows, some almost a century old, and including the films Knocked Up and Atonement, the NBC series Law & Order, The Office, and Miami Vice, and the CBS series I Love Lucy.[10][11][12] Universal president Ron Meyer told the media that "nothing irreplaceable was lost" and that the company had duplicates of everything destroyed.
I have found exactly the opposite. I've transferred reels of tape, cassettes and albums to digital, and compared them directly. The digital copies sounded EXACTLY like the originals with all the flaws, noises, and characteristics of the analog sources. I've played both back to back for my son (who's hearing is much better than mine), and he couldn't hear a difference either.
The only thing that I found was that the speed of the originals varied slightly over multiple plays, sometimes slightly faster, sometimes slower. It drifts, maybe 1 or 2 seconds over a 20 minute side of an album, or a few tenths of a second over a 5 minute tape transfer.