If someone could execute "bad code" at my boot time, I should be more worried about "why"? the fail must be in other subsystem of my system.
From the security issues I've seen in servers and desktops in more than 10 years, daily, I can say I've not seen too much issues, that could have been avoided by this technology in comparison to other issues.
I'm more worried about bad fonts in HTML5 or PDF, than in the boot stage of my home desktop.
To much issues, just to put other brake on Linux, they do not mean security of the final user at all.
Too many issues
From the security issues I've seen in servers and desktops in more than 10 years, daily, I can say I've not seen too much issues, that could have been avoided by this technology in comparison to other issues.
I'm more worried about bad fonts in HTML5 or PDF, than in the boot stage of my home desktop.
To much issues, just to put other brake on Linux, they do not mean security of the final user at all.