If the DRM system is sequestered from the rest of our computers, then what I described is far from a last-mile problem. It's not a last-mile problem unless supp

If the DRM system is sequestered from the rest of our computers, then what I described is far from a last-mile problem. It's not a last-mile problem unless support for a "protected" playback path is baked right into the OS kernel, in a way that users would have some difficulty modifying or disabling (e.g. mandatory driver signing and Secure Boot). As long as the playback path is not secured by the kernel, there's always a way to intercept a perfect digital copy of the output in software. And the user doesn't have to know anything about user-space API hijacking, LD_PRELOAD, custom driver development, or whatever it takes, as long as there's some software they can conveniently install that does the job. So it seems to me that the proponents of DRM would never accept a DRM system that is sequestered from the rest of the computer.