A/E and TL are the only companies making competitive trucks for the 2wd 1/10th category right now.
I think the low turn out is due to the fact that alot of racers like to talk about how good they are, but can't actually control a 2wd truck very well. The 2wd gas trucks show your ability very well.
Not to mention aggressive driving in the class usually leads to DNF's....alot of guys apparently don't like to lift for turns or other vehicles during a race, so a DNF isn't much fun. This leads to racers running cars built like tanks, but far more speed and noise, which is also cool!
I do know that EVERY race locally and most nationally is won by racers with an Electric and/or gas truck background, most are still racing electric and gas truck now!