The update itself went through on my Pixel 8 without problems, but the reboot was strange.
After the reboot, the device restarted itself before I could enter the pin. That (second reboot) was successful.
After entering the PIN, while the home screen was populated there was a popup stating that a kernel crash had occurred.
I then rebooted again manually. After that no problems.
It has been running for several days without problems now.
Here is the crash file Graphene created: https://nowtransfer.de/cae536a0e7bf