My UEFI refreshes boot entries every time I unplug any drive and boot. That causes Solus boot entry to disappear completely, so I have to re-add it via live usb and efibootmgr. It becomes tedious to download efibootmgr from the repos every time this happens (which might be very often, depending on when I need to unplug the drives for eg. wiping or cloning another drives) and there are situations where an internet connection simply isn't available. Also, I think an internet connection shouldn't be needed on boot rescue tasks.
Efibootmgr and efivar combined takes approx. 107kb, so shouldn't take up much space :)