[alan]

Yes, and when I bought CDs back in the 90s I didn't really expect to be listening to them 25 years later. My tastes change over time.

On the other hand I'm a little confused what you mean by the format going away in 5 years. The format is sufficiently open that anyone can write a player for it (in theory). Unless I lose all copies of the files, there shouldn't be any reason it won't continue to exist as long as I like listening to it.

[jeffwask]

It's not as applicable to music but I have DVD/Blueray rips from 10 years ago that look like dogshit now that would necessitate a re-rip from original. If you download it and it's later removed from from that platform now you have no access to the original and are stuck with your lower quality copy. If you are ripping it, you need to keep all the original physical media which kinda defeats the purpose.

The promise of digital media was permanent access to a library that grew and updated with the technology. If I'm streaming a show I don't need to have 720, 4k, ultrawide versions, that's taken care of. New formats are added as they are developed.