but what has the v8's devoping old tech got us... sfa. The only thing it's done is help people build awsome classic tarmac rally cars, which when you look at it is pretty poor. Our top level racing series tech 'advances' filtering to cars that are 30-40 years old.
The road commo and coona have had IRS for 15 years or so.
compare that to the advances group a gave us. would we have cars like the M3, GT-R, WRX, EVO if there was no group a....probably not. And the bigger question, would we still have a group a wtcc if Burnie wasn't running the show back in the late 80's
If group a continued, Nissan would not have ruled for long. Remember there was plenty of awd rally cars that could have removed there restricters and moved to the circuit.