> These secure boot systems exist because of DRM protection to media that is mandated by the content companies That might be an effect but I doubt it's the cau

> These secure boot systems exist because of DRM protection to media that is mandated by the content companies That might be an effect but I doubt it's the cause. Signed bootloader's have been around longer than Android and longer than the Netflix app. They were originally introduced to do things like -- protect the device subsidy lock, prevent customers from flashing their phone with invalid or buggy firmware, prevent modification of radio functions (maybe required for FCC license?). Nowadays they're useful for more than just DRM too. I'd guess that since the owner unlocks the phone functionality, they are a big disincentive to thefts.