>And when some component of the server fails, your app is unavailable until you can repair it. So you need another server for redundancy. And a load balancer. A

>And when some component of the server fails, your app is unavailable until you can repair it. So you need another server for redundancy. And a load balancer. And a UPS. And a second internet connection. Most applications don't actually have a four 9s uptime requirement. Like, how many otherwise healthy businesses closed up shop during the cloud providers we've seen in the last year because they didn't have their stuff implemented and deployed such that it would remain fully functional when these issues happen?