Site Isolation for WordPress: How to Stop One Compromised Site From Bringing Down the Rest

https://telegra.ph/How-managing-42-client-e-commerce-sites-manually-led-to-three-security-breaches-and-a-catastrophic-Black-Friday-outage-01-19

I learned the hard way at 3am: a single outdated plugin on a low-traffic client site can turn into a midnight epidemic when the server is configured poorly