I don't know. I am only going by what I have read so far. I am definitely not going to put my Switch online to find out the hard way.
Again, all we are going on is rumors and reports of what others have gone through. It is all still a waiting game to get more official news from people far more in the know than many of us here.
Yeah! Seen a few threads of black screens too. Then again maybe it was a bad NAND backup at fault there.