Not even a defense of Apple here… but I think most everyone does know. We just agree to bury our heads in the sand and not to do anything about it as long as service continues in good faith.
It comes up occasionally ever few years, whenever Amazon claws back an ebook or something like this (particularly egregious) thing happens. But then we just go back to normal.
Blurays are obscenely customer hostile too, but I decided a long time ago that they’re as close as I’m getting to owning a copy.
At least I have way to inoculate myself against this scenario without outright stealing.
But now even Blurays are getting harder to buy. Some of the bigger titles I try to buy aren’t being made… or never were (streamer exclusives).
I think many made the same assumption that I made: A movie can be withdrawn from iTunes or an eBook from Amazon, but if you already bought it you'll retain access, it's just that no new sales can be made.
Regarding BluRays, and to some extend DVDs, I'm in the same boat. I have season one of a TV show, but season two never made it to DVD and now it's locked away in the vaults of some production company, you can't even stream it. There are so many movies and shows that will just be lost in the future.