Sell Me Your Women, Your Children, Your Vintage Turntable...

Interesting assertion. Let's deconstruct.

First, can't do the test you recommend because I have ESL's, but I am confident that it would disconfirm your assertion.
Second, environmental rumble is obviously a function of environment. The most usual source is traffic. I specified, "far from a freeway." Perhaps I should have added "railway" and "volcano", but thought that "freeway" would stand for all.
Third, vibration does NOT travel through everything. Proof: since your Sota TT is a thing, and you say that vibration doesn't pass through it, vibration does not pass through everything.
Obviously it is a matter of degree. Here a high mass TT is useful, while a suspension with its own resonating frequency may be a liability.
Fourth, it would seem that ambient sound would only vibrate the tonearm if the frequency were right, the shape were right, the effective mass were low, and the volume were high.
That's an argument for a high mass tonearm and cartridge, rather than a suspension with its own resonating frequency.

Or so it seems to me.

MC, how do you come up with all these YouTubes?

They have this little box, it's like a search or something. 
😂🤣😉
I know, not what you meant. Encyclopedic memory? 😏

@petey15 ....maglev feet, *mmm* I'd think the fields would effect the cart in some obscure way.. ;)

Sorbothane, thick as one can afford, feet.

I must say that considering a vintage TT has been a fun distraction.

There are some gorgeous looking restored decks out there and the custom plinths in some cases are works of art.

The Technics SP-10R looks like a real beaut, here's a video of OMA who make a nice cast iron plinth - https://youtu.be/AazHsWk-8C0

I thought this was a great video too, from OMA. Some interesting turntable history and views on direct drive versus belt and idler: https://youtu.be/UEcQd1SZ8S4

So, what to do?...hmmmm

Dunno. But while you're thinking things over......   
https://www.youtube.com/watch?v=qdbrIrFxas0