Ok, this really surprises me as (considering all the exceptions like Kevin Gray upgrading his mastering equipment with “audiophile consumer” grade cabling) the rule I perceived over a long time while reading about it or talking to such engineers was, that quite any kind of audiophile improvement with cabling, accessories or even more expensive equipment is seen as unnecessary by the base of the professional scene. Finding one caring for it on a halfway comparable level like consumer audiophiles do, regularly led to surprised reports in forums or magazines other than considering it as usual.
My perception so far was that if the common professional cares for e.g. cabling, it’s on a comparably much lower level than what even medium serious audiophiles are used to.
I even remember Cookie mentioning a few times how little her “usual” professional colleagues care. Or Paul when mentioning equipment like mic preamps were not designed to a level yet he’d do from an audiophile perspective.
While there are a lot of ignorants of audiophile infrastructure components also among Hi-Fi consumers, my perception there was, that the main reason for this was mostly limited funds for things aside of the anyway expensive components and a resulting decision to ignore and build up a philosophy out of it.