When I worked at FB, I once brought down provisioning of bare metal fleet-wide for five hours because I forgot a semicolon in the .bashrc of the boot ramdisk...

When I worked at FB, I once brought down provisioning of bare metal fleet-wide for five hours because I forgot a semicolon in the .bashrc of the boot ramdisk... the linter didn't catch it because it only went off of file extensions, and ".bashrc" didn't end in ".sh". Even huge behemoths aren't immune from CI and linter issues. Agreed on your second point as well.