tl;dr
Brief History Lesson: The cap used to be 90%, back just a bit before ToAU I believe is when they finally nerfed it down to 80%. This was when you had Relic DRK and WAR/DRK with Rune Choppers doing nuts with haste, attacking at 10x normal speed.
Yeah that's right, that last 10% doubles your attack rounds from 5 to 10. That's why they lowered it to 80, and why it's never going back. QQ moar.
