@the-audiophile-barista
The interesting discussion is of course how much worth you should attribute to it, but claiming that differences cannot be heard is just factually wrong.
Of course it is.
To deny that there is an audible difference is disingenuous to say the least.
Maybe just blatantly dishonest.
As someone once said, the truth will set you free.
Perhaps that's the problem here, perhaps some vested interests here might prefer others to not be free?
As for how much worth we should give to these sonic differences, well that's always going to be a matter of personal choice.
However, it is generally accepted amongst most audiophiles that the evidence of your own senses is more valuable than that of someone else's hearsay.
I had a good firsthand experience of this only yesterday when I took my highly regarded PSB M4U1 headphones to compare against a friend's Philips Fidelio, Sennheiser 599 and HifiMan HE400 headphones.
The PSBs were close enough to the Philips and Sennheisers to be considered a matter of taste, but they were all no match for the HE400s.
Somehow, all of the reviewers I had previously read had forgotten to mention just how good planar magnetic headphones could be when it came to transient response and resolution.