I love my 2017 Model X, but my 2018 Model 3 has 1 DC motor and 1 induction motor and comes to a full stop on regen braking. The X just coasts on regen after speed slows to a walking pace. Not having to move my foot to the brake pedal makes a more pleasant driving experience. Also, the 3 goes into Hold mode after stopping. I am told the DC motor is required to accomplish this.
I wonder if Tesla could "fake" this on an X like mine, by just applying the brakes gently for the final speed reduction. ISTM that all this computer power and OTA update capability could add this refinement to my "Flagship" vehicle.