It's too bad MIP discontiuned the stinger in the first place, even though the Nitro Stampede is still in production.

I guess you could caulk that up to demand. Traxxas probably only sells 1 Nitro Stampede for every 10 T-Maxx, revo, Jato, or Rustler they sell.
That all boils down to the fact that Traxxas has essentially done nothing for real upgrades to this truck since its inception.
They most likely just view it as the entry level monster truck on par with the Nitro Sport as an entry level stadium truck. Its a shame, the Stampede usta be Traxxas's "pit bull" of the monster trucks. Now a-days its looking more like Traxxas's Labrador