Townshend Springs under Speakers

@charles1dad not sure if it was this thread or the other Townshend thread, but there was a Wilson speaker owner who found the Podiums a profound improvement over spikes.
I think Wilson would fall into the 'inert cabinet' group, so I think that busts your theory.

Couldn't find the Wilson reference, but this review is with Magico S7s which are at the edge of the art for cabinet construction:
https://forum.audiogon.com/discussions/review-townshend-audio-speaker-podiums

FWIW here is another reference to using the Podiums with Magico speakers:

vac_man13 posts06-29-2021 12:39pmI just recently replaced Isoacoustic Gaias under my Magico A3's with the Townshend Podiums, and I must say, the results have been astonishing. The bass is much tighter, faster and articulate; in contrast -- and I have to admit that I did not really appreciate this before making the change -- the bass was kind of bloated and did not have the degree of control that I now hear. More importantly, though, the mid-range and high frequencies became much more open and detailed, and with that, better imaging and a much improved soundstage. It's as if I just substantially upgraded my speakers. The Townshend Podiums work, and they work extremely well.

That certainty appears to be a contributing factor (Speaker cabinet construction and type of floor/surface they are sitting on). ) Seems what Richard Vandersteen was alluding to given his post testing comments and results in his two seperate rooms. You have to give him credit for actually trying a product with his own speakers.
Charles

I already gave him credit… actually it was cash ;)

So I’ll stick with the spikes they came with.

Sound Anchors does apparently make stands for 2Cs as shown in this ad.  
I cannot speak to "most people," but my large monitors each weigh 105 pounds and have the densest cabinets of any speakers I have owned. They are mounted to 70-pound Sound Anchor stands that sit on commercial carpet with a thick/dense foam pad over a concrete slab-on-grade. For years, I used Sound Anchor's own hardened steel spikes and later edenSound's Bear Paws to spike the speaker/stands to the concrete floor. I more recently tried decoupling the speakers from the floor by first using Herbie's dBNeutralizer products (giant fat dots and gliders) and then I tried damped springs.  Even with the dense cabinets, heavy stands, and concrete floor, I like the sound of the decoupled speakers on springs better than how they sounded spiked to the floor.  Not a night and day difference, but I perceive improvements in clarity, tone, decay, and the naturalness of the presentation.