When editing a Tabular Model for SSAS/AAS with VSDT, we can choose the code view (JSON). For the initiated, editing through the code view is much faster than with the UI counterpart. Since PBI runs on top of a local Analysis Services instance, it should be possible to edit a data model directly in Code View as well. This would enable porting back from SSAS/AAS models to Power BI at a time when, quite frankly, modeling in Power BI is all around more flexible and resourceful.