I didn't run into the 11.0 problem, but I read about it. I had my own wonderful experience just before Christmas. I purchased a base M1 MBA for my son for Christmas. I decided to try it out to see if I wanted to buy one for myself. It had issue with my external monitor flickering so I d/l the latest beta to see if that would fix the issue. When it came time to box it up to give to my son I decided to wipe it and go back to a non-beta. OMG, you don't even want to know how much of a PITA it was. Gone are the days of holding CMD-Option-R or Shift-CMD-Option-R and just downloading a non-beta. I had to download the configurator software on my wife's MBP and go through the process similar to the 11.0 issue to recover. I hope Apple fixes that in the future, because as of right now it's a hot mess.