Hello, I waited until this morning to attempt the upgrade, which I did from the GUI. Now when I boot the system, it seems to boot from the flash stick, I see the menu and can pick a different boot item if desired, but it never fully boots and then the system reboots.
It looks like the kernel is going into the weeds shortly after the graphics driver kicks in, because sometimes I see the screen change to a higher resolution (the text gets much smaller) but I see a lot of flickering and garbage lines on the screen as well, and what looks like more messages pertaining to the disks, and then it goes dark and reboots.
My hardware is a Ryzen 5 3400G, 32 GB RAM, RoG Strix B450-F motherboard, with a SATA card and two USB controllers added in.
I see a previous folder on the USB flash, if I have to can I just copy those files back to the root folder and boot back to 6.9.2?