There's definitely excellent advice there. Also note that Carbon Copy Cloner has been successful with a beta release of Big Sur, and yesterday I posted that statement by Dave Nanian.
For me, I've always said that I am going to wait until after a release or two of Big Sur comes out. And that will be for my testing of it.. I will remain on Catalina until a compatible version of Tech Tool Pro is released (assuming my other 4 critical apps, including SuperDuper!, already have such versions available).
