I agree that it's low, but things do happen. Come out of an air conditioned vehicle with an optic into hot humid afternoon above 95 degrees and that optic is semi-useless for a minute or more.
I run DD fixed +RDS w/QD personally, but would have a set of MBUS on any gun that could make use of them- so cheap, so useful, so tough.
Having run multiple LPVO on my guns, I've decided for my personal needs, they don't meet my parameters for performance and the cons outweight the pros.

