Definitely the kind of mistake that gets made after losing an enormous fraction of your institutional knowledge.
This new twitter incident could well be a result of layoffs and the resulting loss of institutional knowledge, but that's hardly a foregone conclusion.
[0] https://en.wikipedia.org/wiki/2021_Facebook_outage
[1] https://blog.cloudflare.com/cloudflare-outage-on-june-21-202...