From what I can remember, and especially recently, this is the latest time a new mac OS has not been released yet. I wonder if Big Sur is much more challenging for Apple, or if Apple is deliberately timing Big Sur's release with their Silicon Event expected to happen on November 9th, or possibly both. Either way, all the more reason to exercise caution in moving/upgrading to OS 11, especially the first few versions. As I mentioned previously, I will test Big Sur (probably after V11.1 is released) on a separate external SSD.
