@erik_squires , I use measurements every time I design a speaker, which is fairly often. Sometimes there is a discrepancy between my observations and the measurements, and in those cases I try to find the explanations. I remember my first attempt at designing a speaker using decent measuring equipment, and the closer I got to "flat" the worse it sounded. My measurements were accurate, yet there was more going on than what my measurements were telling me.
Often a particular measurement doesn’t tell enough of the story, but attempting to understand "enough of the story" is inevitably a descent into the technical.
Of course I could be wrong at any point along the way.