This whole discussion reigniting your thread about visiting Tang and hearing his system started when I asked specific questions about you inserting the Mooks into his system. So, for starters, this is a discussion about Mooks, or more generally, about footers. I have not heard Mooks in my own system, only in a friend's system. It was too long ago to describe their effect.
My "main components", I mean: speakers, electronics, source. I view cables as tweaks. Supports can be tweaks too, unless they are generic, solid, sturdy, racks. If they have special shelves, they are tweaks, IMO.
Regarding switching between cartridges, or arms, or DACS, or turntables for a different sound, I consider that tweaking the sound of one's system to his mood at the moment.
I can't speak for Tang when he wrote something about "sorted well" or something, but for me it means selecting components that are appropriate for each other. That means speakers for the room; amps for the speakers; preamp for the amp; cartridge for the arm; arm for the cartridge and turntable. I suppose room treatment is a tweak so far as they are adjustable, varied and alter the sound of the room to the listener's taste.
I am sorry you find a problem with this whole debate. I find it quite interesting and perhaps worthy of its own thread. FWIW, I define homogenizing as the effect of a tweak that moves a system sound away from transparency. Of course, one could argue that that could happen with any component including speakers, amps, or source. No one said this stuff is easy. Well, perhaps David does.