I can see the utility with pre-2005 Ditech models with analog dash, but since the Factory models with digital dashboard in theory could show all the relevant troubleshooting info, and I know at least provide some ECU error codes, I was wondering what additional information/utility the Gameboy ECU software could provide in the troubleshooting process?

I saw a picture where it showed the throttle position % for example, which I don't think is available on the digital dash alone?