This makes me think of a different kind of a kill-switch. What if the OS itself is required to have a kill-switch that triggers once it goes out of support, and

This makes me think of a different kind of a kill-switch. What if the OS itself is required to have a kill-switch that triggers once it goes out of support, and it prevents regular use unless the admin goes through some serious hoops to override. It at least squarely puts the blame on 1) Orgs that willfully override v/s passively ignoring to update 2) OS vendors who have really short support cycles (~1 year for most android phones)