Well, for the past year since finishing the PCT I've been pretty much tarping exclusively. I did about a week with an MLD Duomid but other than that I've been learning to tarp with my Oware Catbird.
So........ after much back and forth, hemming and hawing, I ordered a cuben Hyperlite Mountain Gear Echo tarp for the CDT. I'm going to pair it with a MLD Superlight Bivy and that'll be my shelter system for this hike.
I never thought I'd prefer a tarp to a tent but after the learning curve I think I'm a convert for all but dead-of-winter hiking.
But... I swore I'd never buy another cuben pack or shelter so who knows....