I would most definitely say not to do it in a road car. There is absolutely no point or advantage in doing it.
Left foot braking, once you have mastered it in the right setting, is an amazing and almost balletic feeling.
Also, the use of left foot braking is very different between two and four wheel drive cars. ou really need to set up the car properly also to get any benefit from left foot breaking.
For me, I used to spend a lot of time working on the rear brake bias especially with a two wheel drive car. There is no better feeling than hammering along Hafren or Myherin with your right foot constantly planted to the floor and using your left foot to dab the brake to unsettle the rear and steer the car. The first time I attempted it at 90 mile an hour plus on 5 or 6-type bends, totally crapped myself as it felt so wrong but then sooo right when you get used to it..
Those were the days…