DVD perhaps yes, until the disc degrades.

Which is the same constraint as pretty much any other physical item one might purchase. "reasonably a forever" is a reasonable description.

Ok, how long do you have to rip & copy the content as you desire? It is still reasonably a forever version. Before you bring up laws around keys, first consider that jaywalking in front of your house is illegal too. Again, it is reasonably a forever version.

> BluRay no, because your player's keys can be revoked when you pop in a new disc

Wait what? How? How is that possibly legal?