DARPA Robots are full 2.1D autonomous. Cars have far less degrees of liberty and their "environment" is heavily subsidized. Why are drones (3D evolution) and e

DARPA Robots are full 2.1D autonomous. Cars have far less degrees of liberty and their "environment" is heavily subsidized. Why are drones (3D evolution) and electric train (1.xD evolution) easy to build? Well in the case of drones makers don't care about limiting the movements so rules of feedbacks are easy. In case of train, it is even easier. It is all about the size of the decision tree and the number of input(sensors)/output(effectors) that are coupled you need to control. There probably is a metric to give you the domain of "accessible" low hanging fruits of automation that can be set according to the domain. General purpose automates are at best expensive, at worst a scam (see the mechanical Türk). One way to make bots efficient is to specialize them. Hence the Jacquart mecanic computer that created the industrial revolution of 1830 and set the workers on fights and created the conditions for WWI. I guess no one saw the problem of efficiency still exists even with infinite R&D budget. The problem of robots is by requiring quite a lot of investment for their deployment they set an unfair competition between people being backed up by capital and innovative self made man without capital. That was the reason to be of the Luddites.