Comment # 8 on bug 1167780 from Fabian Vogt

(In reply to Steffen Winterfeldt from comment #6)
> Anyway, it's a question about how big you want the changes to get.
> 
> Autodetection with LOADER_TYPE=auto (or whatever) needs to be synced with a
> number of people. As it is now I would guess quite some people have both
> bootloaders installed while using only one of them. So autodetection might
> imply some surprises.

At least "grub2-auto" (not full "auto") would just select between i386-pc and
efi depending on how the system is currently booted. Neither installing i386-pc
on an EFI system nor installing x86_64-efi on a legacy system would have the
desired result without manual work in addition anyway, so I can't imagine a
case where this would be a step backwards.

> Adding some switch to plb would be more limited.

Yes, but also wouldn't work OOTB as those would have to be added to every
caller of update-bootloader IIUC.