I guess there are two important questions: * For individual banks and their customers, is it more likely that an AWS-wide exploit will compromise an AWS-hosted

I guess there are two important questions: * For individual banks and their customers, is it more likely that an AWS-wide exploit will compromise an AWS-hosted bank, or is it more likely that a self-hosting-specific exploit will compromise a self-hosted bank? * For society, is it better that security efforts are concentrated in on centralised providers like AWS, or is it better that security efforts are distributed, on individual hosting entities?