Power or RISC-V ISA hardware are in low stock, have very few, specialised vendors and are not affordable. I have great sympathy for people who refuse to pay the outrageous difference to off-the-shelf hardware that can be bought anywhere just to gain a level of privacy that they should have in the first place.
AMD and Intel have rootkits in their hardware which are designed to be exceedingly difficult to remove. If the customer is a spy agency, they will ship with the rootkit disabled. If the customer is just a normal person like the one writing the article, one will not be able to have one for money or good words.