While I agree with the statement, I also slightly disagree.
The manufacturers and experts on BA technology, like the rest of the industry, have yet to provide any research paper showing evidence to their claim. If they had, we wouldn't be having this conversation.
It doesn't mean that it's real, but it's real in their mind so what does it matter?
Even if a paper was released showing no change in frequency response or some other current measurement, that doesn't disqualify the possibility that there are aspects that we can't accurately measure or even know about currently.
Science is ever-changing.
Maybe 10,000 hours makes them sound like audio euphoria or maybe it just reduces the product life span. The situation remains the same: Opinion = Opinion. Not Opinion > Opinion.
its the NANO fiber aspect of these that requires significant burn in. i remember when JVX started putting out nano fiber headphones they sounded just trashy out of the box and needed colossal burn in to sound right. advanced speaker manufacturers like ZU AUDIO are not nano coating their drivers and strongly recommending 400 hrs of burn in for their speakers to sound right!