I am subscribed to that Weber Auto YouTube channel. The professor has compared several transmission technologies from the very first GM hydraulic/automatics to the latest from many manufacturers. Watch them all, and you can see that in all of his objective explanations, all the automatic transmissions in the world have GM's history in them, even the Toyota and Ford transaxles for the latest hybrids and plug-ins. If you have good automotive friends who are fans, send them a link to the Weber Auto videos.
I have a theory to test if I had the money, resources, place (maybe an airport strip), and time. My theory is which is the world's fastest plug-in's speed in reverse? My guess would be the Chevy Volt which has the most powerful electric motor, since none of the hybrids can use their gas engines to supply horsepower (except for electrical power generation).