I have some python based lambdas for simple service/user story monitoring. The couple problems I have with lambdas, which mean I will _never_ use them for a proper application:

- The language choices available do not meet my needs - Impossible to create a prod-like setup; all our services run on k8, so mini-kube works great locally - You lose any sort of control over architectural decisions (for better or worse) - Poor code structure/quality/re-usability leads into poor developer experience. I enjoy most new technologies I pick up, all I got from Lambda was frustration.