Is the public beta supposed to be different than dev beta 3?.. anyways I was also eager to try Big Sur after reading the release notes of beta 3 seemed like they fixed a lot of things so I decided to give it a go on my main work machine and call me crazy I installed it 30 minutes before my morning meeting lol.. it all went great I did not lost anything or even had to reinstall any software all my stuff works like normal. This was my experience so far with my MBP 16. I upgraded directly from Catalina 10.15.6 btw.