@jerryg123 who has apparently left us brings us a good point which I'd like to elaborate upon.
There have been several times in my audio journey when I listened to a system that was beyond my ability to fully process it. Over time and with experience, our brain fine tunes itself to discern the differences in fidelity.
The differences I hear in my system to a non audiophile might be difficult for them to hear. When I point things out, sometimes they can hear it, sometimes not.
So perhaps the law of diminishing returns also plays into not yet having the developed palate to hear the full differences.
I posted about this previously, but I recently evaluated high end shotgun mics for my film shoots.
Schoeps make a full size and smaller size of the mic I just purchased. The smaller mic has the same capsule but different electronics. Common wisdom in the pro audio world (and manufacturer) is that they sound the same, just without the filter switches. However, to my ear I could easily tell the difference in the side by side comparison. The larger electronics with higher current sounds clearly more dynamic to me.
If I didn't have the experience from listening to high end audio (and a lot of live music,) perhaps I wouldn't have been able to hear what pretty much no one else on the pro audio world