It's amazing the length some people are willing to go to to defend AWS marketing slogans as a source of truth. I've seen vendor lock-in before, but AWS seems to be unique in that people actually enjoy working with a vendor whose services go down randomly to the point where they blame themselves for not being "fault-tolerant".

Guess what, if your service is not required to be up because the consuming service is super tolerant to it timing out after 140 seconds, self-hosting it becomes even more of a no-brainer. After all, you clearly need none of the redundancy AWS features.