I spoke with Microsoft… and one of the things they told me was that the way that they're slipstreaming non-Insider systems into the update process... is they have this matrix of configurations, pc configurations: at one end they have the ones they know are going to work great because it’s just a collection of devices for which they have all proper drivers and everything's going to go great, and then down at the other end is the black hole where there's lots of problems, and what they want to do is get as many people who have all the good stuff updated as quickly as possible.
So it's kind of random… to the user, in the sense that I've heard from many people that "I have this one PC, this brand new one, and I'm not getting the icon, but I have this other one that's a couple of years old, and I did get the icon, you'd think it would be the other way around.
But it doesn't have to do with the age of the system or what OS it's running, it has to do with the components and the drivers that are available and so on.
And so the ones that will go first are the ones that happen to be in the known good part of the matrix, and that will improve over time.