Sometimes the ability to boot an efi-capable image from any efi partition is useful. For example, I used it to install multiple operating systems (including Win

Sometimes the ability to boot an efi-capable image from any efi partition is useful. For example, I used it to install multiple operating systems (including Windows) without a flash drive — you simply create a sufficiently large efi partition on any disk in the system, unpack the iso on it, and pick the new option from the menu. Then wipe the partition when it's no longer needed. It even works if you have only one disk — the firmware is supposed to support many efi partitions on the same disk, and although I'm sure some of them don't, I haven't personally seen any.