> "(Astute readers will notice they are all AMD (Socket AM4) motherboards. The whole Meltdown/Spectre debacle rendered my previous Intel system insecure and unsecurable so that was the final straw for me — no more Intel CPUs.)"

This is just random FUD.

(1) AMD boards are vulnerable to Spectre - https://www.amd.com/en/corporate/speculative-execution-previ....

(2) There are other vulnerabilities that affect AMD boards - https://community.amd.com/community/amd-corporate/blog/2018/...

(3) Vulnerabilities are found everywhere. That's not the first time vulnerabilities are found, and it won't be the last. How is that an argument for anything exactly?