I broke $100k on my system early last year after retiring. I replaced everything but my speakers and turntable last year. I planned to replace my speakers early this year but after changing out electronics, running dedicated power lines, adding the AQ Niagara, adding a wood floor with wool rugs, adding acoustic treatments and a month of concerted effort to get the bass right with subs and speaker placement; new speakers are no longer a priority. I have also made several tweaks that turned out very well. Not all tweaks turn out well but that is part of the fun of discovery. I also have a new turntable being built right now. I expect my system to be stable after this final equipment change.
It is true that the room is an integral part of the stereo system. I am fortunate to have a large den and so was able to dedicate the room to the stereo. The biggest lesson this past year was how to get the bass right. Even after room treatments and adding a 7/8" wood floor it still took me a month of effort to finally get the bass to sound as good as what I heard on a very expensive pair of speakers at the store.
All I want to do now is listen to music. I noted that the tube timer on my preamp showed 1300 hours after one year. That's 3.6 hours/day on average. The longest I seem to be able to go without turning the stereo on is about two days. I guess I am getting good value from my stereo.