That's an insightful article. Thanks for sharing. I still prefer the whole (logical) approach of having VM/Container/Unikernel per execution. FaaS isolates misbehaved calls/payloads from other calls. It also makes rolling out new versions easier, as it will handle ANY new call to your function. AWS has reduced Lambda's cold start a lot in the last years, but Cloud functions still have a long cold start-up time and not the best performance. I think it's a matter of time for FaaS to become the first choice for computing for most enterprise projects.