I mean, in the bending of a seatstay or chainstay in a frame 1mm difference to me sounds like a mile. 1mm in a spring/damper system would be nothing, but for a "beam" 1mm sounds like a more tangible difference.

The "compliance" of your bartape is apples and oranges but 1mm in bartape thickness certainly matters. Or in your gloves.

I hear and agree with the science here, I think you're just discounting the practical application actually mattering. So will have to just chalk it up as I disagree.

I wish before selling my alloy cross bike I put the Notio on it. The Notio has accelerometers that easily for the same tire/pressure setup could have registered usable values.

As the ride feel on same tire/pressure on the carbon TCX is like fine ribeye compared to the dogfood of the alloy Crockett I had. I honestly went into that bike purchase wanting electronic shifting. I didn't care about a weight or "compliance" change. I didn't even believe it would matter for which bike beat me up more. Same tire pressure and tires...........I had to do a double take after riding the TCX. Like, I was shocked how different it felt. I checked the tire pressures, etc....