U-joint vs pot coupler

The U joint will transmit more vibration to the steering wheel.
I don't subscribe to every factory design....
Lean Burn.
Bulkhead wiring.
Ammeter.
9 inch drum brakes.
Having a starter, ATF cooler lines, shifter linkage, KD linkage, transmission wiring and speedo cable on the same side of the car.
BUT in most cases, the factory was damn good.
The pot coupler allowed fore and aft flex. It softened vibrations. It is fairly simple and parts to rebuild them are cheap.