I've been a very happy lambda user (using Scala); serverless architecture is really nice. There are some remaining issues (e.g. cold start; although should not

I've been a very happy lambda user (using Scala); serverless architecture is really nice. There are some remaining issues (e.g. cold start; although should not be an issue once you actually have decent amount of traffic); many of the issues are getting resolved rather quickly (e.g. API Gateway integration has improved dramatically). I am not aware of any alternatives that come even close to lambda especially if it needs integration with many other services.