> Open sores zealots have been spewing that nonsense for 15+ years

Pro tip: If you open like that, people won't take you seriously even if you happen to have a point.

> and all it has done is held back Linux from providing the security benefits of Secure Boot and transparent full disk encryption in an easy-to-administer

Also, we have that. In fact, I accidentally reenabled secure boot on a Linux box recently and only even noticed because it broke the nvidia driver. The closed source driver. If only I'd been more dedicated to only running FOSS then it would have worked.