Microsoft did something like this years ago with XP. They invalidated all the early keys from 2002-2003 IIRC. Which then broke the installations for multiple PC's owned by consumers and organizations, and meant those keys were no longer usable if the OS on those PC's needed to be reinstalled. Yes, this did actually happen. I had to work on PC's for a couple of people that had hard drives fail, but when I went to reinstall the OS it kept telling me that the OEM product key from the COA sticker on the side of the case was invalid. Ultimately ended up having to purchase new keys (OEM pack with disc) for these systems in order to reinstall the OS.
Also had a PC Tech friend that told me the same thing happened to some of the PC's he'd worked on.