With DRM+streaming as default the world will be relying on rights holders and streaming services to preserve an archive of cultural works. A situation that invariably will result in loss of a lot of those works once they stop caring or go out of business.

Consider f.ex. the situation with the missing Dr. Who episodes. BBC is still hopping it can recover copies from the public. Had they'd been aired with DRM at the time they would be lost without hope, now at least there is hope.