The MK4 (A80) Supra had a virtually 'uncrackable' ECU. So what! Enthusiasts with new BMWs will have to maybe look at standalones again, like we did in the olden days of japanese performance
I can totally understand BMWs thinking. They want to control the develop of performance with their engines. Their dealers probably won't be burdened with as many shady warranty claims anymore either.