Yep, it's true, Microsoft is 100% open source:Yes, but the point is if you don't like Windows you can use any of the several versions of Linux OS (which includes Google). Also, anyone can write software for Windows because it is open source. If you're a gamer there is no other platform worth using. Not so with Apple, you're stuck with whatever they give you. I'm really not interested in any brand loyalty arguments here. I'm well aware there are a lot of trendy fanbois who love Apple no matter how crappy it is. There are benefits to both platforms, I just prefer the free-market of the PC over one controlled by one corporation.
https://fossbytes.com/microsoft-open-source-company-windows-office-free/