I suspect the actual reason is a lot more banal, it's enterprises asking for it.
People who own fleets of devices and need to keep them secure don't care about homegrown Linux distributions, they want to minimize the fallout from that one employee installing the "FlashPlayer update" again. Those are the people driving the concerns of Microsoft and computer vendors.
> People who own fleets of devices and need to keep them secure don't care about homegrown Linux distributions, they want to minimize the fallout from that one employee installing the "FlashPlayer update" again.
How does secure boot help with that? Those kind of users aren't going to be pulling the CMOS battery to reset the BIOS password.
People who own fleets of devices and need to keep them secure don't care about homegrown Linux distributions, they want to minimize the fallout from that one employee installing the "FlashPlayer update" again. Those are the people driving the concerns of Microsoft and computer vendors.