Or just modify sites like DownDetector to show who is hosting each site. When{n} number of sites are down hosted on {x} one could draw a conclusion. It won't be as detailed as "xyz services failed" but rather the overall operational chain is broken. There could be a graph that shows 99% of sites hosted on amazon US East 1 down it would be hard to hide that. This could also paint a picture of what companies are not active-active-multi-cloud.