Back in July the Power BI team announced the availability of a new connector for Azure Data Lake Storage Gen2.
In recent weeks I’ve been starting to hear questions that sound like these:
Question: Is this ADLSg2 connector how you get to the data behind dataflows?
Answer: No. Dataflows are how you get to the data behind dataflows.
Question: Is this how I can access dataflows if I don’t use Power BI Premium?
Answer: No. Dataflows are not a Premium-only feature.
Question: Can I use the ADLSg2 connector to work with CDM folder data?
Answer: Yes, but why would you?
If your data is already in CDM folders, using the ADLSg2 connector simply adds effort to consuming it in Power BI. You’ll be working with raw, untyped text files instead of working with strongly typed entities.
If your ADLSg2 data is already in CDM folders, strongly consider attaching the CDM folder as a dataflow. This means less up-front work for you, and less ongoing work for the users who need to get insights from the data.
Question: Why do we need an ADLSg2 connector if we have dataflows?
Answer: Now that is a good question!
Power BI dataflows store their data in CDM folder format, and they can be configured to store those CDM folders in your organization’s ADLSg2 data lake. In addition to this, you can attach a CDM folder in ADLSg2 as an external dataflow, making its data available to Power BI users even though the data ingress is taking place through another tool like Azure Data Factory.
But ADLSg2 is much, much more than a repository for dataflows or CDM folders. ADLSg2 supports all sorts of file and blob data, not just CDM folders. And sometimes you need to work with that data in Power BI.
The ADLSg2 connector exists for these scenarios, when your data is not stored in CDM folders. With this connector, users in Power BI Desktop can connect to ADLSg2 resources and work with the files they contain, similar to the existing HDFS and Folder connectors.
 Yes, this is another catch-up post that has been waiting to be finished. No, I do not have any reason to believe that 2020 will be any more forgiving than 2019 has been.
 I could have linked to the product documentation or the official product page, but I believe that Melissa‘s blog does the best job summing up ADLSg2 in a single post.