> Surprised that OP managed to disable secure boot (implies there is a normal UEFI boot style firmware)
Windows RT tablets had UEFI/ACPI. I Assume it was easier to bolt Intel baggage onto Arm machines so they didn't have to change core windows kernel components which are probably deeply anchored to the PC architecture.
I haven't tracked Windows ARM beyond the IoT editions, but you are mostly right. I see it as good re-use of something that makes complete sense if you want to match Intel configuration and hardware security options.
Windows RT tablets had UEFI/ACPI. I Assume it was easier to bolt Intel baggage onto Arm machines so they didn't have to change core windows kernel components which are probably deeply anchored to the PC architecture.