From my experience with the iMac I felt brave enough to try to update my MBP 2012 which also runs OCLP + Sonoma. Not a critical Mac either. Did everything like I did with the iMac but this time something was different.
1. this time the installation got stuck 🧐
2. did what the guy in video above instructed (boot to Sonoma recovery, mount volume, bless volume etc.) and then rebooted, still stuck at the same place 😨
3. did it again thinking maybe I made a mistake (there were no errors though) but no help, still stuck 😰
4. then remembered that some have managed to get unstuck by booting into safe mode, did that
5. managed to get into login window, after logging in installation continued for few minutes until I was able to log in again, machine still in safe mode

6. installed the KDK, ran OCLP and root patches, reboot - success!
Now it works again. After first complete boot Spotlight was super active and hogged all CPU power. Entered into Spotlight preferences and removed most of the selected options, Spotlight calmed down.
Now some testing but initially seems to work like before. 🙂