For new devices like iPhone X, Samsung S8 and many more upgrades, I think there must be rounded corners artboards with status bars elements included in artboard. We spend a lot of time to find status bars. and then place it. I think this must be default with artboards.
I think Adobe can put in default aspect/resolution ratios for device artboards, but asking to find and update physical art for all the different device types is a stretch. I recommend making a Cloud Library that has the device previews you need at the correct sizes, then you make layer comps in each device preview with the different status bar scenarios you need to use. Then you can drop that on top of any artboard as a smart cloud object and set the object layer comp to "Low Battery" or "No connection" and it'll update. Then later, you can update that cloud object and it'll change on ALL files that use it.