Re: Why would you buy a phone from Microsoft ever again?
My favorite MS Phone: the Kin!
At the time I had one of these: https://en.wikipedia.org/wiki/Samsung_SGH-i900. I'd had it for nearly 2 years when the Kin came out. It was usable, but clunky, and it could not be upgraded beyond WinPhone 6.1, not even to 6.5. It was replaced by an Android phone, which was less usable, more clunky, dropped calls, and was generally a bigger pain than the WinPhone. That phone was replaced by an iPhone. I still have the iPhone.
I nearly bought a Kin to replace the Samsung, but it came and went so fast that I barely had time to see it in local Veriscum stores before it had flitted off into neverland.