That and restoring a NAND backup using a hardware mod.I was that reddit user, Connor on the RS discord later prove that Scires' hypothesis was, unfortunately, incorrect.
It has, however, been confirmed that, if your switch hasnt connected since 7.0.1 was the most recent update, you can cart update to 7.0.1 and it will denag. *THIS IS THE ONLY KNOWN METHOD FOR DENAGGING A SWITCH WITHOUT UPDATING TO 8.1.0. ALL OTHER METHODS HAVE BEEN TESTED AND THEY ALL FAILED.*