Bob Yankle wrote:
A Fantasy surmise: Windows 9 was a follow-on to the mess they'd started in 8. Microsoft fired every one of those young developers, then went out and rehired the guys they'd laid off from Windows XP/Windows 7, and brought them back. These "old" guys didn't want to waste anytime dismantling 9 so they started a new project of their own, and don't have to worry about lawsuits from the disgruntled 8/9 guys for using "any" of their code.
Except you forget about the NDA that all the developers have to sign before they work with redmond. The company owns all the patent rights to all the code written there, and when that's not enough for them they try to say that developers of other operating systems stole code from them.