Here's what I believe: In audio that has to do with music listening and emotional trance, each moment in time is different. The atmosphere changes, the molecules, and the neurons in our brain. Playing a LP will bring a slightly different experience each time. The grooves and the stylus running them will have slight variations from first to second to third...next play. I believe that, but it's the brain registering @ different times which is the biggest influence.
The slight alteration in micron, no. The new dust accumulation, no, if using the record brush for each play.
I believe it is so minimal that it has no real consequence even after dozens of play.
What will though is changing the cartridge, or the weight force.
But what I believe is no absolute, and only measurements can tell how much loss there is from the first play to say the ninth play.
And if there is indeed some slight loss, how much influence does it exercise on our brain.
We would think that any loss is negative, but what if that loss is mostly distortion?
Then the more you play the better it sounds.
It's just a thought. ...Not important in my book, and I like a balanced approach; a lucidity between the listening and the measurements.
Furthermore, within the parallels of our audio analog signals through the album's grooves, the cart's stylus and its design, tonearm, cables, preamp, amp, speakers, every small perfecting improvement is important. ...Auditory wise, measurably wise, and enjoyably wise.