I've been meaning to look at mine for um about 2 years now!
Benefits would be being able to make it change torque transfer characteristics to be more or less aggressive etc....
The more silly evo boys will pay lots of money for a ralliart ayc ecu when you can just flash your normal one with a ralliart rom or make one even better....
Your maf, josh's other maf, lancer definitions, diesel Triton definitions, more auto definitions, getting my other car driving, getting my VR4 ready to be sold, not necessarily in that order etc etc etc lol