Building DRM is actually quite simple, but building secure DRM is surprisingly difficult. https://www.zdnet.com/article/security-researcher-cracks-googles-wide

Building DRM is actually quite simple, but building secure DRM is surprisingly difficult. https://www.zdnet.com/article/security-researcher-cracks-googles-widevine-drm-l3-only/ https://www.zdnet.com/article/security-researcher-cracks-goo... So far, Apple (Fairplay) is probably in the vanguard. But the obstacles aren't so much technical. It's laws like digital millennium copyright act and lack of a need. Many people are fine paying for access and don't mind that it isn't available on some of their devices. Those that don't want to pay have easier avenues like password sharing, bittorrent. The fact that it breaks fair use (and probably invades your privacy, or is riddled with bugs and security holes) is only interesting to FOSS hippies like us here.