Haven't seen anyone write this yet, so: I wonder if this (I mean the whole Linux subsystem for Windows) is gonna be the downfall of Windows in the end. As at this moment, somewhat counter-intuitively, it should actually make more sense to write software purely for Linux, effectively ignoring Windows, as then you'll get Windows compatibility for free. I'm somewhat surprised they didn't actually try to contribute to Wine instead, or build something similar on their own.