My entity logic mover patch got in, slimming down the storage controller classes significantly. This will make it much easier to support them in MongoDB. Two things remained (load and baseFieldDefinitions), load being postponed until the NG conversion is done and the baseFieldDefinitions move architecture foundation just got in. This is progressing remarkably well. At the forthcoming weeklong Dublin code sprint I will move the field_sql_storage module inside DatabaseStorageController ending this weird notion of fields existing somehow separately from entities.