There are many benefits to physical media (in this case optical discs). I’m a huge fan. But perpetuity is not one of those benefits.
I own well over a thousand discs. I believe I’ve had perhaps 15 or so go bad. This is a reasonably average rate of which has been well documented. I have almost...
"no longer available"? I assume you mean not in your library, as opposed to no longer available on iTunes.
We should also clarify which (country's) iTunes store. I assure you that if you purchased an HD version on iTunes US, and you call/chat/report a problem, the film will be restored to your...