@Gargron As someone who works in streaming media, I can assure you nobody is deleting things, especially on a whim.

Yes, things go in and out of availability because of contracts, international rights, royalty expenses, preferential release windows, etc. But all that content still exists.

It may not be available for you to see right now, but it’s not lost to the ether.

Whatever archive streaming platforms use will be here long after the last DVD has degraded beyond usefulness.