The failure is the subscription model itself. If you buy a subscription it has to work and keep working. A perpetual license (the old model) is tied to the time of purchase. You cannot expect a product purchased 5 years ago to work on current hardware and software without modification, BUT when you subscribe to a product the provider is responsible to maintain and support the product. I think Adobe basically does not care about moving quickly on product support for two reasons, 1). They know that competition in their field is minimal and they are not threatened in the professional market. 2). They already have their subscribers. These market forces are in conflict, you cannot have OS developers insisting (or in MS case, forcing) updates to their OSes, and application developers saying that their product doesn't work properly after these updates. It should not be on the end user with a subscription license to be in effect and involuntarily "Testing" (bug collecting) for software vendors, especially in an era where updates to OSes are now so critical (and frequent) for security needs.