I've only been using it for one project right now. I made an API that I can use to push security-related events to a location that a hacker couldn't access, even if they get root on a local system. I use it in conjunction with sec (Simple Event Correlator). If sec detects something, e.g. a user login, or a package install, it'll send the event to the API in AWS Gateway + Lambda. The event then gets stored in a DynamoDB table, and I use a dashing.io dashboard to display the information. It works super well. I still need to convert my awful NodeJS code to Python, but that shouldn't take long.

I do remember logging being a confusing mess when I was trying to get this started. I feel better about the trouble I had now that I see it wasn't just me. But for a side project that's very simple to use, Lambdas have been a blessing. I get this functionality without having to manage any servers or create my own API with something like Python+Flask. Having IAM and authentication built in for me made the pain from the initial set-up so worth it.