Measured performance versus cost levels off alarmingly early with cables, amps, digital sources. Especially if you were under the impression that you were paying extra for gains in measurable performance. Once you’ve seen one CAD CDP or SS amplifier frequency/distortion chart, you’ve seen them all.
Even turntable analysis is heading that way as the recent Technics decks gave demonstrated. PC hardware is rapidly going that way with the adoption of SSD drives, similar with phones as the iPhone X fiasco demonstrated (unless you specifically wanted a handheld games console with a sub 6 inch screen).
It can be like a mountain climb trying to upgrade your hi-fi. By the time you near the summit the effects of altitude sickness and snow blindness seek to destroy whatever rationality you had left.
You could then easily find yourself heavily out of pocket lost and disoriented in a place of little consensus. Your erstwhile friendly sherper / dealer nowhere to be seen.
Audiophiles and Wine Tasters of the world unite. We have much in common with our Sommelier brothers. For some strange reason, not many of our sisters seem to share our passion.
https://en.m.wikipedia.org/wiki/Wine_tasting