That doesn't mean no one cares about it; it means that the licensee doesn't see profit in renewing it.
They know that most users will keep their subscription active despite the lost content.
And "It really whips the Llama's ass" means nothing to the kids these days.
Nirvana CDs are trivial to find; hell, if you're looking for virtually any music older than ten years it's going to be on physical media; but most of it isn't digitized.
And the new stuff? Bandcamp is great, and I get to keep the mp3s.
Even if ıt was the case that vanishes from the surface of earth, it's not that different from last physical copy getting scratched.
Those who have them begin using them as frisbees, decoration or simply trash them.
When I bought that Nirvana CD I bought it for life, and no one has the right to revoke my ability to listen to it.
There is a difference.
99% of my music never was in a cultural prime-time
And people who happen to enjoy music that was truly never prime-time should thank the parents of the musicians who sponsored the free music creation. It wasn't tech or platforms that enabled it, it was VC/Angel investor money and will vanish as soon as the money dries out.
For plenty of music that I listed to neither was in play (for example https://pl.wikipedia.org/wiki/Piosenka_turystyczna )
Plenty of music that I listen to is not available at all on Spotify. Some of entries will never be there (for example, I have some private recordings of music done with my family).
Some cases are not economically viable to be published, but it is not the same as "no one cares about it".
Most of the time though, the people who don't move on simply age and get grumpy claiming that kids these days are horrible and don't understand the value of the thing that they still love.