The tiered storage stuff is pretty cool. You can say “I want this data on this disk, so if I get a cache miss from a faster disk/RAM it’ll come from this other disk first.”
I believe it also has some interesting ways of handling redundancy like erasure coding, and I thiiiink it does some kind of byte-level deduplication? I don’t know if that’s implemented or is even still planned, but I remember being quite excited for it. It was supposed to be dedupe without all of the hideous drawbacks that things like ZFS dedupe have.
EDIT: deduplication is absolutely not a thing yet. I don’t know if it’s still on the roadmap.
Your eye is still open under that flap though, no? I dabbled in Olympic pistol shooting back when I was doing across-the-course service rifle, and I was told to always keep both eyes open by the dude teaching me. Same for service rifle (and later palma). I always found that closing one of your eyes fucks up your focusing. If you don’t have the little flappy dealy, you just do your best to defocus/deprioritize the view out of your non-dominant eye. I actually went for quite a while without any sort of cover because it helped me avoid cross firing (which is probably more of an issue with across-the-course than with Olympic pistol).
You’re absolutely right about the lack of spectacles though. This guy is one hell of a marksman.