That move sparked the ire of Carnegie Mellon University CERT boffin Will Dormann who says the toolkit significantly improved the exploit mitigation chops of Windows 10 and should be maintained, not dropped.
Maintaining the enhanced mitigation toolkit requires money, and doesn't directly contribute to the short term quarterly goals of Endpoint Antichrist. Nor does it help to push everyone onto Windows 10, some sort of subscription or provide any additional lock-in. The only purpose it serves is to make things better for customers.
Endpoint Antichrist hasn't given any fucks about customers thus far, I am unsure why anyone would think he'd start now. Or at any point in the future.
I am, however, impressed by the engineers and/or marketdroids who convinced Endpoint Antichrist to allow resources to be spent on Windows-internal security mitigation technologies. That must have been a truly fantastic conversation. To convince him to release even a bent copper for use on something that threatened to benefit customers...hat's off to 'em!