Hey there, this is a good call out. I agree, this is a disappointing experience. We’re currently working on revamping our client libraries to provide much more timely updates, as well as to follow more best practices for their respective language platforms. You can find more about that preview here: Try an early preview of our new Node.js and Python SDKs
Our goal in the future will be for API launches to be fast-followed with client library updates, and part of the preview is working towards ironing out any issues with that.
In the meantime, @Bastien_Siebman was spot on: you can make arbitrary calls to any currently available endpoint in the client library, even without explicit support for the resources or endpoint in question.
Thanks for the feedback, please keep it coming!