Of course I notice you did not mention the CPCP AD which still requires all the calender inspections. This is why responsible operators do not use the 4,200 hour progrm in that IF you follow the rules there is little to be gained
CPCP has been ammended to co-exist with the 4200 hour program, however, the specific program, as designed, does require enhanced A/B checks, which are still cost effective.
In addition, if the aircraft is stored, it must be on an approved program for either active or in-active storge...simply parking it in the desert without due regard, doesn't work.