I think you would be amazed to learn about how solid it is already.... I have used all of my existing applications flawlessly for the moment, it installs IIS by default which stopped from starting but that's it.
What this article fails to mention, becasuse they probably don't know, is what caused the endless reboots on the systems mentioned, it also failed to mention how many machines/hardware were affected.
And if you have a machine set aside for a "guineau pig" then why not start now, is that not what test machines are actually meant to be used for. Wouldn't it make more sense to know now what if any problems you might suffer, it would at least then give you some time to prepare a mitigatation plan.