Well, actually Google search engine "outages" are fairly common, they are just less visible. Examples: Single data center outage: Search -> load balancers ha

Well, actually Google search engine "outages" are fairly common, they are just less visible. Examples: Single data center outage: Search -> load balancers handle that just fine Cloud -> zone or sub-zone outage Backend failure: Search -> cache should handle that Cloud -> outage Data update failure: Search -> stale search results Cloud -> outage Office 365 also has issues, they can be minimized but cannot be eliminated: https://twitter.com/msft365status?lang=en https://twitter.com/msft365status?lang=en