I'm still baffled why people think this is a benefit. If you actually care about software freedom, lack of copyleft is a bad thing IMO. What's to stop $EvilCorp from creating a system that is completely locked down, can't be replaced, and is based on your technology? That's what UEFI is, by the way. It's only by Microsoft's blessing that you can install alternative operating systems on new Windows laptops. So please tell me more about why copyleft is a negative. If TianoCore was GPLv3, UEFI would actually be more bearable to work with (but core/libreboot is clearly the way to go on from here).