Purveyors of "premium copy-protected video" use Flash on the desktop because the process of distributing, installing and supporting PC software is a giant pain

Purveyors of "premium copy-protected video" use Flash on the desktop because the process of distributing, installing and supporting PC software is a giant pain in the ass, fraught with problems and security risks, to the point that users no longer do it. On mobile, users love apps and distributing and supporting them is far, far easier. Further, flash runs so poorly on mobile devices, and has for so long, that anyone serious about their "premium copy-protected video" jumped-ship for a dedicate app years ago. So it doesn't matter what Adobe does. No-one is going back to mobile Flash at this point. Providers' app investments have been made, the same source content (h.264 video) is used in both places, and they get far more out of their own dedicated app. Further, Adobe's money is made via content creation apps. Flash was a means to that end, but they don't need it. They can still make money off production tools, particularly while people still need to maintain a content pipeline that churns out resources that work on mobile and desktop.