I have owned/own 4 pairs of speakers that all have full measurements (“spins”) on the Kipple system. It just worked out that way and I did not buy due to seeing measurements
My thoughts are as a whole I think what you see is what you get from the measurements, but two things really stand out. #1 is the estimated in room response. The measurements track pretty closely to how my room measures with those speakers and how I hear it. #2 is the directivity, it really does give insight to how the soundstage will play out in room.
where I feel the measurements lack is in transients, or at least I don’t know what I am looking for to see it. Some speakers have far more kick/snap than others even though the in room estimates are pretty similar. There is more to be learned and understood for sure.
I have also not cared for near perfect measuring speakers (Kef blade 2). They lacked the life and detail I get out of my JBL 4367 that happens to also measure very well. I am not sure where to look in the measurements to see that difference or if it is even there. In my mind a speaker would need to be able to produce a square wave to truly represent the impulse but I don’t than any can.