SYSTEM synergy
It may be hard to define in words, but you know when you have it (or lack it.)
A newly selected audio component inserted into your rig can create an audio performance change now ranging from poor/non/optimal to good/ improved.
Think all the daily AGON forum posts asking for new components recommendations.The conflicting responses range widely and all too many simply reflect personal fave bias.
Just because a touted Brand X component seemingly works well in a Respondent system, is no assurance that it will succeed in OP’s system.. “ One size does NOT fit all”…