Resilence isn't enough for some things.
"Cloud services in general may be more reliable, on average, than on-premises services, but the impact when they fail is huge. It is in all of our interests if efforts to further improve their resilience succeed."
It can never be reliable enough. On premises takes out only one company. A small number of Cloud providers with monoculture is an eventual apocalypse.
This fairy tale explains why: https://www.smashwords.com/books/view/716453 also Amazon, Google Playbooks, Apple, Kobo, Barnes & Noble. Soon on paper in the local bookshop via ISBN ordering.
Also some people's own services are more reliable than the cloud.