Would be fascinated to see your data over a period of months.

Application up time is flakey, but what was worse were fly deploys failing for no clear reason. Sometimes layers would just hang and eventually fail for no particular reason; I'd run the same command an hour or two later without any changes and it would just work as expected.

I'd love to make a monitoring service to deploy a basic app (i.e. run the fly deploy command) every 5 minutes and see how often those deploys fail or hang. I'd guess ~5% inexplicably fail, which is frustrating unless you've got a lot of spare time.