Intel has announced that it will be retiring the Atom x5-Z8100P, the CPU used in the Microsoft HoloLens, by end of October this year. With Microsoft likely being the only customer using this SoC, it could have very well been the EOL initiator for these CPUs.
https://www.notebookcheck.net/Intel-to-retire-the-Microsoft-HoloLens-CPU-soon.241422.0.html