I've been banging my head against the desk for almost three months now with this issue. Thank you so much for finding a fix, though!
I do like the analogy about an extreme fix for headaches... though this fix has cured one of my own, that's for sure. I also agree AMD and Microsoft really should have found an actual fix for this by now. C'est la vie. I'm just happy to no longer live in fear of this issue. A few weeks ago, the crash happened during an update, and I couldn't even boot to Windows in Safe Mode or to the command prompt. Such a hassle. Glad I make backups.
After that, I wiped the drive and started from scratch, only for it to reboot again. With the fastboot disabled, though, so far so good. Thank you again! I have no idea how fastboot and the AMD Northbridge would be connected. Maybe someday we'll know.