audio2design
Diminishing returns is the term used by audiophiles with more money than common sense in order to justify that there will always be an improvement ...The concept of diminishing returns is a well-established principle. It is a very real thing, not some imaginary factor.
... in reality at some point there is no audible improvement, and many changes are only different, not better.You contradict yourself. If a change results in a difference, then it's possible to establish whether it is better or worse, both objectively (at least in theory) and subjectively.