As an AWS focused solutions/systems architect, I’ve been feeling this for the last 10ish months too. I attended the first 9 re:Invent conferences (up until Covid upended things) but I was glad I didn’t attend last year; and re:Inforce sounds like it was even worse.
In theory, running a serverless function can provide adequate response times at costs that are unreachable with private servers. It’s basically those services that would run your application for few minutes every time it received a request, but with theoretically lower overhead since it’s supposed to be a function instead of a full application.