I agree, the guitar is overlooked in this genre; waaaay too much reliance on synths.
The majority of sounds on SunDummy tracks were created using guitars, although you'd be hard-pressed to identify them as such. I love how 'organic' guitar samples can be, especially when used as the basis of loooong drones. There's a rawness to the soundwave that just can't be created with synths: the way it fades in and out, the oscilating overtones, strange reverb trails after fingers scrape strings, etc. Chords sound so much richer too, for the same reasons. And when sampled, layered, and looped, the richness of the resulting sonic stew can be astonishing.
Maeror Tri (now Troum), Rafael Toral, Windy & Carl, Stars of the Lid: all these guys have a distinct, unique sound because of the guitars; with synths, it just wouldn't be the same.