The problem Cloudflare had, and from what it seems, still have is that they don't actually test software at small volumes before global deployment. I would guess that two outages in quick succession means the voices saying "You need to test everything properly" might win, but perhaps not.
The Billion Dollar mistake is about not even having the distinction shown in the commit you linked. In languages with this mistake a Goose and "Maybe a Goose or maybe nothing" are the same type.
