I reached a point where I don't mess with my main system. I just sit and listen to music and don't obsess over whether or not I could make it better. I'm sure it could be, but at what cost? Going active could get me there, but it also gives me way more possible failure points. The change may not really be for the better, either, even though we often fool ourselves into thinking that sounding different is better.
I'm not against the measuring and using analysis to make better decisions, but the cost starts going up pretty quickly when you go active.
I'm of the opinion that it's really personal dissatisfaction that drives us to do "better things".
In my case, I had a couple of issues--mostly with room acoustics then in how string orchestras and pipe organs should sound at home, with some HT needs thrown in for good measure. These areas of dissatisfaction drove me to continue my system development until what I was hearing met my needs. This is also that reason I don't do other things, such as "joining the crowd", i.e., audiophiles and Klipschophiles here, since these needs have been very low for me. (My family and job(s) provides for those areas.) My self-assigned role in this forum and elsewhere has always been as "maven" from the definition coined by Malcolm Gladwell.
Clearly I understand your point of view, as I also have settled on the current setup and now I'm into primarily building a music library (perhaps a thread on that subject later...I'd like to hear your and others' thoughts on that subject.)
In the past I've questioned the purchases of others on things like high-priced electronics and turntables, since I feel that these diversions actually dilute the path toward better sound, especially in the area of loudspeakers, since it seems that most audiophiles really don't "get it" IMHO: when it comes to getting the right speakers first, I'm still amazed at the vast majority of buyers that don't invest in horn-loaded speakers since these sound much more realistic and dynamic (if set up well) than anything else that I've heard.
I still remember a trip to Sheffield Audio in Houston in 1979 to this day when I heard two Khorns and a Belle set up properly in a three-speaker array along a long-walled listening room. No tubes here--only really good SS amps (Marantz?) driving in an A-B comparison with level-loudness AR-9s and other speakers of that day. My ears told me the clear winners, but my brain talked me out of it.
My long audio journey continued from there until about 2 years ago, when I realized that I've achieved all the things that I set out to do. Now it's time to use it to listen to new music and movies: I believe that I'm basically "there".