https://0pointer.net/blog/brave-new-trusted-boot-world.html
"Proposed Construction
Central to the proposed design is the concept of a Unified Kernel Image (UKI). These UKIs are the combination of a Linux kernel image, and initrd, a UEFI boot stub program (and further resources, see below) into one single UEFI PE file ... "
Good bye grub, hello UEFI lock-in.
//Peter