Podiums are a serious improvement regardless of what was used before. They are much better than ordinary springs like Nobsound. Several here have upgraded to them from Gaia and feel they are well worth the extra. So it is not just the isolation, but the vibration control aspect of springs that control resonance with tuned damping.
questforhifi, You might want to read your own post again.
"I managed to pick up the Townshend seismic platform for my KEF
Blades for less than what the Gaia i’s would have cost. Now given the
amount of effort KEF has already gone to in making the cabinet inert
(you really can leave a £1 coin on the top for weeks whilst it plays
Prodigy at insane levels), I wasn’t expecting much of a change.
It was simply profound - as significant (maybe more?) than changing my whole digital front end + source + its PSUs.
and
Previously had Soundcare Superspikes - which were definately an improvement over the stock KEF spikes."
So your "reliable user" started with KEF spikes, found Soundcare spikes were definitely an improvement, and then was shocked to hear "profound improvement" with Townshend Podiums.
Sounds to me like the least rigid came out best, and by a lot.
More rigid is definitely not better.