Alternator voltage regulator teardown and analysis

Thanks for doing that.
Yes agree it would be good to have an original mopar one as the baseline.

I should clarify something. The transistorized regulators I've personally had fail are substitutes for the grounded field regulators.
These include the P-part regulators (which were recommended by DC when using Chrysler type electronic ignition with a grounded field alternator), and Standard Motor Parts VR-128 that Dan Stern often recommends, and similar. Currently I'm using FBO's that is in a housing that looks similar to the original electromechanical regulators. I have not broken that one, but also only used it for a short time with a revised squareback alternator.