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The recent D-I-P-F Curve. Reality or just catchy?

I'm a big fan of the P-F Curve we know from Nowlan and Heap and its relationship to RCM. I'm curious what you guys think about this D-I-P-F Curve, developed by Doug Plucknette. I have several concerns about it and what it teaches new M&R practitioners. I'll start with one thought and please weigh in with your thoughts as well. I believe that "predictive" maintenance goes all the way back to "installation" at least. I have others, but I'll let you all jump in if you'd like.