Based on the Analytics Data API Banner ("Keep in mind that these APIs are pre-release and subject to change. Code built using these APIs should not be pushed to production. While we will try to notify you of upcoming changes, you should expect to encounter breaking changes before the APIs are publicly released."), the APIs are pre-release and subject to change.
When is the Analytics Data API expected to be out of Alpha?
When is it expected to be out of Beta?
Is this timeline a few months, a few quarters, or will it take a year or more to stabilize and publish?
Followup question, if this is going to take some time to move out of Alpha / Beta, do you expect to allow "App+Web" upgrades to downgrade back to "Universal Analytics"?
I have also sent an email to the address in the documentation with no response.
Thanks!