I think gas truck started to die off right about the time brushless 1/10th systems became the norm. Its the same now with 1/8 guys going electric. All the power of nitro, with the ease of a RTR. People who cant tune a nitro engine, or just dont like the fumes could get the same speed and power from batterys. I loved gas truck, and would still run it today if it wasnt extinct. I see a few at the track from time to time, but most are sitting alone at a pit table with a for sale sign taped to them.