Sketchy, that would make me very depressed if mine bricked and I lost all my data. Apparently it causes the Switch to be very difficult to charge and no longer able to dock... how did a firmware update even cause something like that? Very strange.
This also happens when you leave it undocked for months and let the battery die totally lol. For some reason when it is really flat it doesn't detect that it is being charged.
You have to hold the power button down for like 30 seconds then plug it straight into the charger for about 30mins to an hour and hope it works lol.
At least with mobiles they detect that there is charge and you know it will take a while before you can boot it up from a long state of being flat for months.