The evo system is interesting to drive with, you find the limit where the tyres are squealing, push a little harder, the computers/diffs shift power to work it out, the tyres stop squealing and you get around the corner faster. There was a guy in Vic that had an X with a wheel speed sensor that would read bad intermittently (pretty sure it was wheel speed). The car would drive fine until you pushed into that computer aided level of grip at which point the computer freaked out if it got weird readings and the car would immediately be spit off the race track sideways/backwards without any warning. The heavy electronics are great now. But as those cars all get old and parts become hard to get, they are going to be nightmares compared to much simpler systems.