People are dropping chainrings left and right. It's the cool thing to do now. I just built a new bike and even though I do 99% of my riding in the middle ring, I decided to "keep it real" with a triple. I rode on Wednesday with my new setup 24/32/42 x 11-36 and never once shifted off the 32t. Buuuuttt.... I know there are places where I will grind it out on the 24 and I know there are places where I will use my 42. Whiteroom is getting ready to build a new bike and is debating how many gears to run. My thinking is that you have to figure out at what point would you just give up and walk anyway regardless of how low your gears can go.
XX1 is a pretty tempting option, but it doesn't cover everything that a triple does.