I am currently using Data Pipelines to archive/backup Hosted Feature Layers on a schedule to an ArcGIS Online folder. Some of the features are connected to Related Table records or contain multiple features within the same hosted Feature Layer, however, these features and tables have to be archived individually, creating a new Feature Layer for each feature or table. It would be nice if we could backup/create a Feature Layer from the hosted Feature Layer and all of its contents. Such that you wouldn't have to set up individual backups for each feature or table within the Feature Layer. Sometimes you have a hosted Feature Layer that has several features within it. At present, you need to set up an individual Data Pipeline process for each feature within the Feature Layer (or Related Table). This breaks the data up in the exported to AGOL folder.
Currently within the hosted Feature Layer, you can manually Export out that Feature Layer in its entirety to a File Geodatabase, or other data formats. If Data Pipelines offered this workflow, it would save a lot of time of having to put the backed-up data back together as a group of features into a single hosted Feature Layer.
