Breach notifications are new and interesting though. Equifax definitely would have been required by the gdpr to promptly disclose.
I don't specifically know if EU credit agencies are in the practice of widespread selling of credit data besides when a person has asked for credit. The gdpr will definitely allow opt-out of that (by default even!), but I think previous privacy laws may cover that. I'm not sure.
My personal opinion is the gdpr is probably the end of Acxiom style businesses, plus all the ancillary businesses the CRAs in the United States get up to besides plain credit reports. Eg marketing, wage tracking, outcomes estimation for colleges, etc.
And there is also the case that the US army just land in your country and arrest anyone they could not kill.
Unlikely; its a lot easier to kill people than arrest them, especially if you are the US army, which is optimized for the former over the latter.