One of my main contentions regarding the overall approach of our hobby toward this issue is that if we were really serious or bothered about it, we wouldn't accept components whose total build methodology didn't address it right from the ground floor.
There are some that try, but very few. In the vast majority of electronic audio components made (high end or not), circuit boards and chassis are for the most part entirely free to do their (entirely random) thing. And look at how few conventional speakers either pot their crossovers in resin, or better yet take them out of the cabinet box altogether.
The oft-propounded idea that certain footers and shelves can somehow 'evacuate' the alleged self-generated vibrations which are supposedly killing the performance of our electronics, whilst simultaneously preventing air- and ground-borne stimuli from ever reaching them, is to me a bunch of bunk, and I've never seen any good data in support of these claims.
Once again, I am not saying that what you put your electronics on can't make a small difference in the way they sound. I'm just saying that the magnitude of this difference is routinely oversold, as is the scientific (or non-scientific, as the case may be) basis for thinking that what's done is systematic or predictable. There's plenty of snake-oil sold throughout the high end, of course, but IMO this sub-area is probably the worst offender, even more so than a lot of what goes on concerning wire.
For the record, I've played with modestly-priced cones and elastomer isolators (plus racks), with appropriately modest results, so if you want to slam me for not having experience with 'the best' (read: the most expensive), go right ahead. The areas I think merit general application are rigidly spiking speakers to foundational floors, and decoupling of turntables. What one does with the rest of the electronics is to me mostly a crap-shoot given the status quo of their construction.