On the draining of resonance.....

Sure, resonant vibrations do occur--damping materials on interior walls, heavy transports, platters--all doing their job at the source. it's these claims of draining vibrations out from the top and killing them from the bottom, and it all takes place at the end of a cone, on a 1 mm round point. Yes, this is effective for mechanical vibrations in the rack, etc, but it seems to be asking a lot of that little point, or saying a lot, e.g., "We're gonna get 'em comin' and goin', yep you can count on it." Vibrations, that is, or perhaps customers.......

I am not quite sure what your point is:-/ That 1. The idea of internally generated vibrations being materially harmful to sound reproduction is unsound, 2. Even if it is harmful, which you doubt, (see 1 above), there is nothing to be done about it, and 3. A little point is less useful than a big point. Or maybe all three?

As for verifying points one and two above, I suggest you try it with a piece of gear with moving parts, tubes or transformers and see if it helps. Start with something cheap like small hard wood blocks directly on your support shelf to replace your rubber coated stock feet, and if that helps, you can try more elaborate and expensive "solutions".

As for addressing point 3, I think a mechanical engineer could add value here, but here is a lay person's take. Let's say you have a 35lb tube amplifier with big transformers that generate some internal resonance you want to "get out of the chassis". Your options are the 4 x 50 mm diameter rubber coated feet resting on your glass, wood or MDF shelf versus 4 x 1 mm points sunk slightly into a 4" thick hard wood slab (the same general size as you gear chassis or bigger, not to be confused with the small wood blocks described earlier). In the first case, the feet may slide slightly on the surface, reducing the transfer of energy to the shelf, and more likely, the rubber will act as a spring to some degree, storing and releasing energy back to the chassis, smearing over time any residual effect of the internal vibrations. In the second case, assuming a solid connection between the chassis and the body of the point, energy in the form of vibration from the chassis is transferred directly and effiently to the underlying wood slab, which then dissipates that energy as heat between and among the matrix of it's fibers. External vibration from the room can be minimized by isolating your shelf and or the wood slab with some kind of soft material that reduces effective transfer of vibrations to the wood and the chassis of your gear.

Ultimately, this is all just a bunch of words. You can continue to try to make some points, or you can just try points to see if they make a difference. Up to you.

I don't think you should get hung up on the exact reason
something may sound better or worse. Putting some type of
aftermarket footer under a component may change the sound for
good or for bad and that's the only thing that matters.
Personally, I think too many people knee-jerk for aftermarket
footers and IMO, they're not always an improvement. In general,
they seem to clean up a muddy-sounding system, which is good -
IF your system is muddy. But it seems to me that the vast
majority of complaints around here are that their systems sound
lean, forward or harsh and I don't think that cones or isolators
are going to cure that.

Thanks for taking the time, KN. It's not that I doubt resonance occurs or that it does not need treatment. I'm just trying to get my head around this draining concept underneath the chassis on "mass loaded" points. I do listen to a GNSC modded CDP, treated by Allison Dynamics--the name escapes me--he was a guy who was part of the process. The damping materials inside my unit are impressive, as is the heavy TEAC clamping system. I use the Wadia factory spikes, but also the pucks. No problem understanding that. I have also isolated my big ARC mono blocks, each with no fewer than seven rubber feet from the factory. I will not defeat those with metal spikes--better to supplement them. Your thought of rubber bouncing energy back into the chassis....you may get some pushback from makers of rubberized isolation products on that one. My isolation scheme involves at least wood and granite, which certainly needs treatment, as well--always a process. Granite looks good, adds mass, but also picks up energy in the room. Not to put too fine a point on it, but yes, I do acknowledge resonance

I use Mapleshade brass cones and wood under everything. I never liked the sound from real or composite granite. I was told the danger of rubber feet is that the vibrations cannot escape the component. Fortunately it's easy to try (except under heavy amp), and see which works best for you.