Mopar ecm issues. Why wont they work?

I’ve never gotten multiple dead units, but I had a bunch that would start to miss and break up past 3,500 rpm or so. Aftermarket ones, Mopar replacement ones, etc. I cleaned terminals, ran ground wires, same results. That was years ago and the quality of the ECU’s was already getting bad, I had a few “chrome boxes” that would work but the standard and orange boxes were junk. I ditched them entirely and went with “ready to run” distributors that don’t need the external ECU. Cleans up the engine bay, most of the ones now have better curve adjustment, and you’re still dead in the water either way with an ECU failure since both depend on a board somewhere. Plus most of the ready to run types ditch the ballast resistor too.