I'm sure Microfot has many smart engineers that make a lot of cool stuff in their labs, but almost none of those are coming to market, so in the end all that research goes to waste, or perhaps to patents that they'll only use to sue others later.
It's definitely an impressive bit of tech, but would it have been possible were its genesis subject to the byzantine internal politics of Microsoft? I dunno. I wouldn't put money on it.
Meanwhile, consumers don't buy functional programming languages.
Unlike Apple, Microsoft is also interested in business models that aren't B2C.