The all important question
This all really depends on the car. Touring/4-wheel drive/front driven wheels
With a 4 wheel drive vehicle - Ackerman is a very important tuning tool.
2 wheel drive and a live/solid rear axle - aka Pan Car. Whole different world.
I always believed that an undriven wheel - pan car - is adversely affected by ackerman - the less you have - the better the car handles.
But I invite discussion on the pan car -