Re: Isn't it obvious
"Apparently they don't live very long and have an inability to wake after sleeping, and always have done."
Neither of these is particularly true, in my experience. There's some serious heat problems with the higher-spec models, though, and the Surface Book's keyboard segment is ropey as hell. But other than that, they're actually pretty solid devices. I'm also not entirely sure that anything at the price of a Surface Pro can be considered 'low margin'.
SatNad probably will drop it by 2019, though, simply because he seems determined to kill everything aside from Windows, Office 365 and Azure.