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The connectors VM use currently the manufacturers tout as having signal tight technology whereby unlike other connectors they don't loose signal if not tightened properly and therefore supposedly don't allow noise ingress either or not as much as usually expected from a loosely tightened connector
I'd imagine it was 1 reason they switched.
Because they was using 1 type of ppc ex6 connector, then even though that connector is still available they switched to the NT+ variant which has the kind of serrated nut and features this supposed signal tight technology,
The cable you are referring to which VM use is RG59 which you are correct is not triple shielded. But the vast majority of installs and even JB has previously said are done in RG6 which is triple shielded.
They used to use it, but I gather it was phased out mostly in favour of RG6 with the exception of a few installers using it for ease of installation who are in the minority... But lots of installers don't even bother to tighten the f connected either so they probably don't care about the state of a customers installation or noise ingress and leave that to networks to worry about. But doesn't make it'sright.
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