Kyosho Mad Crusher.
As for upgrades, I've literally upgraded to the point that only the linkages, engine mount plate, and body posts are stock.
As for companies "getting out of nitro", currently that seems to mostly be Traxxas, though they still have their nitro models, just no new ones. I still see plenty of nitro activity with new engines, chassis, and what not coming out, there seems to have actually been a bit of an uptick recently. I also see a lot of new nitro activity in the FB groups I belong to lately, many people starting to either try it out or get back into it.