[DannyBee]

>But wait, how do you know that's what this is?

A lot of these extensions come from Intel/AMD/etc clients first, and because of how long it takes a thing to make it into mainstream chips, it was probably conceived of and worked on at least 5 years ago, often longer.

This particular thing has a long history and depending on where they worked, they know about that history.

However, they are often covered by extra layers of NDA's on top of whatever normal corporate employee NDA you have, so most people won't say a ton about it.