For those who are security-conscious and are still on the fence about, say, buying a Raspberry pi (ARM) as a desktop:

https://freundschafter.com/research/system-alternatives-without-intel-me-iamt-and-amd-psp-secure-technology/

because of things like:

https://freundschafter.com/research/about-intel-management-engine-intel-me-intel-active-management-technlogy-iamt/

and

https://freundschafter.com/research/about-amd-trustzone-amd-platform-security-processor-psp-amd-secure-technology/