This topic comes up a bunch still. Someone please correct me, but as I understand it anyone using new chips that use Intel ME (or AMD's equivalent) have a gaping hole in their security that no OS can patch. I know puri.sm[0] takes some steps to try to plug the hole, but haven't read up to see if it's effective or no. [0] https://puri.sm/learn/intel-me/
The existence of security coprocessors is not a security hole and firmware updates to these processors can be released if a security issue was found.