I never said it was hard, just not as practical as modifying a command line, for example in Grub, that already has the UUID setup. Also, not sure how many peop

I never said it was hard, just not as practical as modifying a command line, for example in Grub, that already has the UUID setup. Also, not sure how many people have the UUID lying around ready to be copied. If you have encryption setup, there's even more parameters to add. Again, it's not hard, but a bootloader with an editable command line is just much simpler.