We are in the process of migrating our Python 2.x scripts that run as scheduled tasks to Python 3.x. One of theses uses the 'MetadataImporter_conversion' method. In testing, this failed, indicating the Arcpy 3.x does not support the method. I ran the method from a python window in ArcGIS Pro 2.3.1, and sure enough, it's not there. ( The auto-complete provides arcpy.ImportMetadata_topographic, but I haven't looked at that....)
Is there a list somewhere of Arcpy methods that were once supported in 2.x and are no longer supported in 3.x? Does such a list provide replacements?