functions-framework-dart VS dart-express

Shelf provides different functionalities that I can be abstracted of, some other packages are using it also, like functions framework

I have been doing a review of the backend portion of our product development and have been researching Dart Cloud Functions Framework this product is under most developers radar, even Flutter developers but you can write serverless functions and deploy to gcloud very easily. I had to let go of my full stack dart dream because we love using firebase and couldn't fully interact with firebase events. I'm keeping a very close eye on it because the development environment is amazing for local dev it's also containerized using the official dart docker image.

As part of a full-stack talk for an upcoming conference, I'm going to do a very short demo with a Flutter desktop app calling a Dart serverless app (created with the Dart Functions Framework dartfn tool) running on Cloud Run.

I've already looked at it, I think it's a great lib however I like the style of express.js so I came across this lib which seemed quite interesting, however it's a shame it lacks maturity.