I’m sure most of us are aware of how Cobb Accessports work, or JB4s piggyback ecus or even MHD flash tuning, but why aren’t more companies making at home tuning devices similar to these for other platforms? I notice that some enthusiast cars don’t have many of these kind of devices while others have many why is that the case? As an example the pre 2019 A45 AMG and CLA45 AMG don’t have anything like this but basically any performance Volkswagen (GTI, GLI, R) have some sort of at home tuning device.