Windows Store, oh goody!
So, I was trying to install the Arduino software on a new laptop the other day, and I noticed that there's an Arduino app in the Windows store. Of course, when I click to install that, it tells me there's an internal error and they're sorry. Luckily, I can just download the installer straight from the Arduino site and get on with my life.
That's not the case with Windows S apparently, and that will be the killer. Nothing kills your products momentum like being told your only mechanism for installing/upgrading apps is experiencing an internal error.
And my Arduino example isn't just random. I imagine many STEM-focused education programs are taking advantage of boards like the Arduino. Just not, apparently, until Microsoft fixes their issues.