Except that all of these older digital formats are essentially just obsolete storage media. You can rip a CD, DVD, or Blu-Ray to a more modern form of digital storage and have exactly the same content.
Media from the analog era, though - that actually worked differently.
True. But that said, I still come across rips of vinyl recordings from... sources. Generally, the quality is obviously inferior; but I've found a few that sound very good, and at least one that sounds more detailed and balanced than the CD. And when an official digital source isn't available, I'm very happy to have a conversion from analog performed by a fan.
Similarly, I've come across some digital copies of television shows from the 60's and 70's which weren't released on DVD. They were converted to digital by fans - sometimes from VHS, sometimes from off-air or CATV. And although the degradation is obvious, they're still quite watchable.
In any case, having the music, movie, or TV show in a quality that's not the best, is better than not having it at all.