Apparently neither do Blue-Rays, since about 10 years from now hardware that will read them will become scarce.
In maybe another 5 years it will become an ordeal to get software that can bypass the DRM working on a recent system with whatever Blue-Ray drive you could scrounge up. This may be accelerated by such software becoming even more illegal to create and use.
Additionally these kinds of discs physically degrade within about fifty years tops. Some can become unreadable after a much shorter time. The time range "20-50 years" is often thrown around.
If you want to preserve something long term, the very first thing you should do is strip any DRM, then save it as a "dumb" format on long-term storage. Preferably decentralized with multiple backups (Torrent?).
This stuff can go incredibly quickly and it will become harder every year to salvage anything. I learned this the hard way with my library of .swf files, of which I only managed to convert a subset to video files (where applicable) so far. For now next to them I store a disk image of an OS (old debian+Firefox+Adobe Flash) that can play them - who knows how long that will keep working on future hardware?
Sometimes I wonder if this urge to preserve is patently ridiculous and we should learn to just... let things go.
In any case, the Blue-Rays sitting on your shelf aren't much better than some streaming service.