A good treated room can cost many thousands of dollars. But the thing is, even if you spend tens of thousands building your room with all the acoustic treatments with the right dimensions, a cheap stereo will still sound cheap.
False.... A purpose built room+a sizeable investment in treatments that actually work can drastically reduce the perceived performance gap (and all associated metrics of audiophilia) between high end gear and relatively affordable gear.
For example, I could demonstrate to guys like you how a 60k speaker and a 1k speaker sound in the same room (one of my rooms)...a good one with about 40k to 50k worth of treatments that work, i.e. how close it starts to get.
Of course, if such truths get demonstrated too much, the "high end" sales guy (which is maybe half the forum) may start to freak out that his sales numbers could suffer. But then again, he need not worry...because most audiophiliac dudes love to buy a few hundred thousand dollars worth of gear, plop it down in a sht house and hope for miracles anyways. Such dudes may usually buy 2 doofus panels, put it up in a couple of spots for decorative purposes and claim that their room is treated! Hence, the high end sales guys has nothing to worry about...high end sales will be great as usual. All is good in the world...Amen.