I mentioned previously that my external beta drive had died. I got a new external SSD, installed macOS Big Sur on it and then upgraded to Monterey Beta 10. It is nice to have a beta running again. I can tell you, at least on this external installation, Monterey is very fast and seems to work quite well. Of course, you never know how things will go until you install it on your main machine with ALL your Apps and other stuff. I am encouraged and hope it is less buggy than macOS Big Sur has been.