Running services at scale is hard! And having everything in the cloud does put all of your eggs in a single basket. Also having all on-prem, home-built stuff is

Running services at scale is hard! And having everything in the cloud does put all of your eggs in a single basket. Also having all on-prem, home-built stuff is the same problem (eg. Facebook). Hybrid cloud solutions should help somewhat with impact when a service provider goes down, hopefully you can shunt your services locally and isolate yourself from the problem. But I doubt anyone is really doing that at scale either.