The driver binaries for the old kernel got cleaned up and new ones never got downloaded. I'd have been stuck on the CLI, which wouldn't have been the end of the world, I'd just have to pull the drivers down myself.

But not an experience for non-technical friends.

I am using Nvidia so I have to be very careful. I regularly run into issues with system vs flatpak driver versions getting out of sync and losing acceleration in most of my apps. Thankfully it has happened so many times now I know how to resolve it quickly.