Ultimately, the progression along this course led to the disasters of the 1980's, which devastated GM's passenger car business.
Cadillac was very innovative up until 64 with the start of automatic climate control, but Cadillac didn't really invent or came out with anything new in the 70's. This was decade of laziness for Cadillacs. Nothing really truly new or advanced, but more so refinement in engineering.
I agree with Brian; I think '71 began an era of less individuality for the GM divisions; more "corporateness" if you will. It was also the first year of net horsepower ratings, and cars designed for unleaded gas.
A longtime Cadillac enthusiasts told me that all Cadillac engines built prior to 72 used tolerances that were of aircraft quality. Most engines of the day could have sloppy machining and bad tolerances, but not Cadillac engines. All this changed when the NET horsepower rated engines came into effect. I heard that it was too expensive for them to build engines that required extra care, oversight, and perfect fit and finish, so they built engines that didn't require such close tolerances after the change over to NET horsepower rated engines which doesn't mean that the engines that came after were bad or not as good, but they didn't build them to such precise measurements.