Haven't mattered much since Annihilation of the Wicked in my eyes. Many will say that they haven't mattered since Black Seeds Of Vengeance and they wouldn't be completely wrong.
I remember when Dallas had a skullet and Karl operated his personal MacBook Pro.
The first four Nile albums are solid classics. The last four (Ithyphallic onward) have had great parts but they weren't fully what they should be.
Dallas is good, but he was taking over the vocals and giving this kind of Thrash metal style that really wore thin. It did not fit Nile at all (and was ruining it for me). Interesting that Karl references the triple Death Metal vocals in the statement about the new guy. I wonder if other people have been complaining about it to him....