End users should also keep in mind that artists and studios will frequently republish media to change or edit things on streaming services. Famously Kanye West spent many months making changes to the "Life of Pablo" album after its release: https://www.xxlmag.com/kanye-west-the-life-of-pablo-changes
Star Wars (the original trilogy) is also a classic example of this. The studio added drastic CGI changes for the 1997 release and still continues to make small fixes in subsequent releases. I believe the only way to watch it now in its original state is via old VHS tapes or bootleg scans of the original 35mm film.
And sometimes they just needlessly mess things up – for Bob Dylan's Bootleg Series, for a few years now online they've managed to lose the pre-gap material from the physical CDs, so instead of a seamless live album you now have some less-than-smooth track transitions and are also missing out on all the funny (Vol. 6) respectively infamous (Vol. 4) interaction with the audience.
