Let's keep in mind that if this is a state actor or some sort of global organized crime, then they don't put all their eggs into one basket. If that's the case, they're going to have a bunch of other plans and backdoor attempts ongoing. This isn't the end and we can assume there's something else somewhere that went unnoticed.
Security is a constantly changing war of attrition, not a goal/product/configuration.
Probably fear, then subsequently followed by their brains next to you on said wall. Whichever government paid for a multi-year campaign to backdoor enterprise Linux distributions is not going to be happy about this failure.