Our room acoustics content and parameters are there to be optimized for our listening position...By the right ratio of absorption/reflective surface/ and diffusive devices or surface, by mechanical control devices as resonators and/or by DSP ...What we can do with DSP can sometimes have a mechanical equivalent so to speak...
For me system/speakers/room/ears are one integrated set of factors...
i am here because i am interested by music jazz and classical...By acoustics theory (not mere room acoustic).
My present system is low cost and modified in my small acoustic corner and satisfying for me (the pieces are in my virtual page )...Nothing to brag about here and to compare to others system...
My dedicated acoustic room is now in the past because i sold my house...
If i had photos and if you looked at it, you will think i am nuts...
One idiot mock me for a week few years ago and i did not even see all my room ...
I mostly used among others homemade devices 100 tuned resonators in bundles distributed from the speakers drivers around my listening position in a specific way ( a kind of mechanical large band room equalization which modified the pressure zones levels too).
The result were astounding. It takes me 2 years to tuned them to my satisfaction . I am retired i did it 7 days on 7... It is how i learned basic acoustic concretely with my ears... it was fun... I read a lot about applied acoustics... Now i am interested by hearing theories...
Your implicit argument is very interesting : if you dont post your system anything you say is disqualified ... 
The problem for me was never bragging about gear but understanding how to optimize a system room...Now the interesting problem for me is : what is sound. it is not just wave for human hearing, it is "meaning" associated with a vibrating sound source physical invariant which the brain analyse in a non linear way by acting on it . It is why i am interested by psycho-acoustics... I am also interested by speech and linguistic a related field ...
By the way Choueiri is not "a rabbit hole". It is a serious acoustician whose articles and videos inspired me among others acousticians...
My dedicated past system/room was homemade, with plumbers trash tubes collection among other materials..