You make some great points.
I think detail chasing can be a fools game. Although it may simply be the first stage of pursuing high quality audio, along with slam. In many ways the most obvious characteristics. Once you get lots of detail… and these days it can be gotten pretty cheaply, many folks move on to the the many numerous other characteristics that one needs for a system to sound great. There is a great amount of experience needed to figure out what you want… so some changing is required the get the experience.
For me, knowing what I wanted came from steeping myself in live acoustic music for over ten years and listening to it like an audiophile. Not everyone has the time or interest to do something like that. But for me I don’t want my system to sound different… I worked for decades to get a system that sounded exactly like it does. This by no means is this right for you or anyone else… it’s just me and my personality. There are lots of ways to enjoy this pursuit.
I really like the idea you brought up about variety. In the days when buying an album was a significant investment. I remember times when I would look forward for a week or two to going out and buying an album I wanted. Greater appreciation of the small library you owned could be a driving factor or system change… making the library new. An artifact of music ownership.
Now with virtually unlimited access to music with streaming, I find that I get tremendous variety through new music… in fact I seldom listen to music more than two or three times any more.