Hi @anmassey ,
Based on my understanding, currently Analytics API 1.4 is supported & we haven't released any information regarding deprecating the API 1.4 yet because there are many methods which are still not available in API 2.0 yet. Even multiple tools like Reports & Analytics, Report Builder, etc are also based on API 1.4. So, we will continue to support the API 1.4 until the time the functionalities which are available in API 1.4 will be available for Analytics API 2.0.
Maybe in future Adobe will consider discontinuing API 1.4 in the future but I don't think this will happen until all major methods which are currently available in API 1.4 will be supported in API 2.0 as well.
Hope this helps.
Regards,
Abhinav