My 2016 MacBook’s flash drive was actually destroyed after installing one of the first Big Sur betas earlier this year making an exchange of the whole motherboard necessary as it’s all soldered in one piece.Interesting how Apple put out the Public Beta months ago and this is discovered just now? You mean nobody with a 2013/2014 MBP ever had a bricking issue all the time during the public beta? Hmmm. Sometimes I get the feeling that these issues are made up in order to crap on Apple when they release new products. Furthermore while I'm not saying bricking should happen I think it's a stretch trying to install the latest OS on near 7 and 8 year old computers and expect to have no issues.
The specialists at the Apple Store didn’t seem to be interested in the cause and handed me a quote for estimated repair costs... 🤷♂️
(P.S.: I declined the quote and repair and bought an SSD that is since attached on the outside of the screen.)