Running a large scale analytics tracking backend for a game on AWS (written in swift, needs some hacks). About 5 million requests/hour.

Pro: - Dirt cheap (pay only what you need) - Scales fast and large - Just works

Cons: - Getting swift to run is very hacky

Considering to replace the game backend (scala on ec2) with Swift on Lambda (plus API gateway)

ps: Lambdas do run in containers/instances that get reused ... unless they are idle for too long.