Hi, I'm the author of GAI. I'm glad that you are happy with it! I'm using it a lot myself, both for own and client projects, but I wasn't sure if anyone else was. :D

I'm actually trying to build it out in a way so that gateways aren't necessarily necessary. Cost and token tracking happen through OpenTelemetry. Fallbacks and retries are handled through the new “robust” package, and I have other plans as well. You're always welcome to file issues in the repo for things you'd like to see but aren't there yet. :-)