TL;DR: Google is consolidating behind the whims of the hardware org, which are orthogonal to OS' that can't ship (what ppl outside Google call Fuschsia), and here, OS' that can't sell premium 1st party hardware. The old platform org head left recently, combine that with the CEO's eagerness to display Efficiency™ and the lack of interest the CEO has in practical work, that means VP shuffle people around to keep constant/shrinking headcount and the CEO loves it.