The heavier the car, or more correctly those with a greater front weight percentage, large amounts of castor, positive rim offset ,& perhaps front wheel drive- then the need for power steering is there. As some folk on the site mention they would appreciate it in road driven cars for manouvering in tight parking areas etc , but you dont see or hear of many complaints on the track. In a race car I see it as just another power sapping extra-- I know the owner of the TVR was convinced that he needed P.S. at one point, but once we got the handling sorted & it was no longer a pig to drive, that 'need' disappeared. Probably a lot of cars in that category where P.S. has been fitted to overcome a problem that only require a change in setup.