For me it's doing things within reason based on the room I'm in. In other words I'm not going to spend $X on cables when I don't have equal reflection points, but I do believe in cables). You can put unlimited resources into a system but if your room isn't set up great you will never get the performance in full. LMMV but I don't think very much from the room rule.
It’s all a matter of degree
It may be stating the obvious, but each A’goner will have his own idea of how far he must go to satisfy his addiction. To one member, enjoyment can be obtained with just a setup and no tweaks. Another will add a few or several and be satisfied. Then there are those who must go on an all out quest for nirvana which may never be sated.
Which camp are you in?