The 2013 and 2014 MacBook Pro owners complained that the macOS Big Sur update was "corrupting" their devices. ABOUT
Users reported that during the updateon macOS Big Sur, their laptops started showing black screens. MacBook owners couldn't even use the keyboard shortcuts to reset, start in safe mode and restore over the Internet.
Apparently, the vast majority of users faced with the problem are the owners of the 2013 and 2014 MacBook Pros, with 13-inch models. By the way, they must support macOS Big Sur.
One of the victims was advised by Apple Support to have the MacBook Pro repaired. Perhaps the owners of such laptops should postpone the update for now.