I wonder how much hand wringing the author and commenters over there did regarding the development system for Linux that allowed code that broke hardware into an actually released version of the kernel and major distribution? With customer's computers physically broken and requiring system board replacements for a fix, it certainly should have risen to a greater scandal for the Linux community than a bad code getting into a pre-release version of FreeBSD then subsequently removed. Strange that I can't find any articles from Ars regarding that (may just be my bad searching skills).
My TLDR version of the incident:
Bad code got pushed into late pre-release.
Code review caught the bad code before it made it into release.
Code review was not by core but by the developer of wireguard. If he hadn't made it public, and FreeBSD 13 was out today, it would have that wireguard code in it.
They (core) escaped this by luck rather than good systems being in place.