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I'm starting to wonder if there will be a growing market for car shops to do what I've done to my Supra:

Pull out the entire wire harness and replace it with an aftermarket Power Distribution Module system, ECU, and CAN-BUS controller. Remove all this monitoring and connectivity crap, but keep the best parts of a modern Japanese car: the bulletproof mechanical components. It's expensive and time-consuming, but also saves some weight.