> The Technology team’s post-incident investigation identified the primary root cause as a gap in environment controls. This control gap allowed an unsanctioned process to initiate an automated operating system update on production infrastructure where such updates should have been disabled.

source (link given in the twitter/X post): https://newsletter.pragmaticengineer.com/p/why-reliability-i...

The problem seems much more about operations and process than anything else. Letting a third party (your OS provider/default config) decides when and how your production systems are updated seems quite unreasonable (for many many reasons).

I am not sure to understand why systemd is faulty here ? If you do believe systemd is faulty, why ubuntu would not be as faulty at least ?