Yup. E.g. on the MS Surface RT ARM devices it couldn't be, for instance. I wrote about this nearly a decade ago: https://www.theregister.com/2013/11/14/micros

Yup. E.g. on the MS Surface RT ARM devices it couldn't be, for instance. I wrote about this nearly a decade ago: https://www.theregister.com/2013/11/14/microsoft_surface_rt_stockpile/ https://www.theregister.com/2013/11/14/microsoft_surface_rt_... AFAIK, rather than make the firmware unlockable, MS sent vast amounts of inventory to landfill.