This is why there needs to be a law requiring sellers to support their DRM systems for a required number of years (after last using it making a sale). Either th

This is why there needs to be a law requiring sellers to support their DRM systems for a required number of years (after last using it making a sale). Either that, or require them to unlock the DRM for affected customer. As it stands now, sellers can sunset a DRM system with no consideration of its users.