@ghdprentice I've never been here prior, this over period of thirty years of serious system building. I'm like you in that I've had various lengths of time where I thought system just right, those didn't last more than a few months and never did the word revelatory come to me. We'll see if this is indeed the end of upgrades, the long run will tell.
However it turns out, it is small incremental improvements over the long run that got me here. Based on my observations, it appears vast majority build satisfying systems in like manner.
I ran into individual some years ago that had sudden urge to spend well over $100K on system. Based on equipment purchased it appeared he based those purchases on Stereophile equipment ratings. Individual wanted me to come over and give my endorsement for his system, knowing I was long time audiophile. I ended up not going, wasn't really interested in hearing high value system put together with no thought or knowledge of putting together sympathetic equipment in a cohesive manner. I believe its the small incremental improvements one makes that leads to best sound quality, and one needn't spend multiples of $100k to get there.