@coldacid @Moon I'm not entirely sure how you'd do it with EFISTUB tho as that's just the UEFI booting the kernel directly without the need of a bootloader.

I guess you could use hardware RAID although on consumer hardware that's usually limited to RAID 1 or RAID 0 and is notoriously unreliable.

I guess the best solution would be to have several separate /boot partitions and just copy your kernels over. If there isn't a way to automate it already then you could probably use an rsync script as a hook for your package manager easily enough.