Why Do Some Tamiya R/C Model Vehicles Come ESCs and Done Do Not?

Some Tamiya R/C cars, buggies, trucks, vans, jeeps, busses, and tanks come with shrink wrap and some do not. The same is true of ESCs (Electronic Speed Controllers). Why this disparity? We unwrap these dual mysteries of the radio-controlled model vehicle world that are not universal, and rather regional, in this episode of the RC Deep Dive podcast.