There is value in the concept of ensuring that your computers are running only the software you want to be there. Beyond that, I can imagine that Red Hat has plenty of customers who would be entirely pleased to know that their systems will not boot if the kernel or bootloader have been tampered with. Yes, it's a feature worth taking seriously. UEFI has lots of problems, but so do the BIOSes that preceded it.
The sticking point, is always, is who holds the keys. As long as the owner of a computer can control what runs on it, life is good. Retaining that control will be something we have to fight for, as always.
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