I've had trouble with uefi on my laptop with Linux so for me openboot is a pretty strong selling point. I lost power in the middle of an update once as it was updating the kernel and boot certificates. When I powered my laptop back on it wouldn't boot at all. It wouldn't even get back to the grub screen. At that point I'd uninstalled windows and had to fuck around in the secureboot settings manually following some obscure instructions I found online. Luckily it worked but it was not fun.