We all remember the havoc that some Grub update wreaked on many usersā systems a while back.
Many are still ātraumatizedā from the experience. Some have moved on to other boot -loaders/-managers.
I went all in Guinea pig today and installed Grub 2:2.12-2 from core-testing repo.
[2024-03-17T11:09:57+0100] [ALPM] upgraded grub (2:2.12-1 -> 2:2.12-2)
[2024-03-17T11:09:57+0100] [ALPM-SCRIPTLET] # grub-install ...
[2024-03-17T11:09:57+0100] [ALPM-SCRIPTLET] # grub-mkconfig -o /boot/grub/grub.cfg
Following the suggestion in the terminal to the letter, I reinstalled the efi binary (grub-install with my own options) and regenerated grub.cfg.
After some moment of light anxiety, upon reboot, everything came back up.
All well in my corner of the Archland.
Do Not Try This At Home!
YMMV.