They're planning to completely drop and delete all Google data in 90 days, once they are sure the new plan works out.
FTA:
> We expect to migrate entirely from Google Analytics to our self-hosted InfluxDB instance in ~90 days at which point we will remove all Google Analytics and destroy all existing data.
FTA:
> We expect to migrate entirely from Google Analytics to our self-hosted InfluxDB instance in ~90 days at which point we will remove all Google Analytics and destroy all existing data.