Connect ADLS for dataflow storage - powerbi file system

Last November when I followed https://docs.microsoft.com/en-us/power-bi/transform-model/service-dataflows-connect-azure-data-lake-storage-gen2 to do some testing, there is a required step called : Create a file system for Power BI, it is about creating a container called "powerbi" to store the CDM folder of power bi dataflow.

But recently, I found out that now this part isn't exist in that document and after my testing I found out that the steps in the old document "Create a file system for Power BI" is still required in the actual practice. (In my hands-on testing recently)

So I want to ask the team, whether creating a container, a file system named "powerbi" really is still the required step for allowing CDM folders to be stored in the connected adls, and whether the doc https://docs.microsoft.com/en-us/power-bi/transform-model/service-dataflows-connect-azure-data-lake-storage-gen2 really lacked this part. Or is this part be recorded in another document?