Back when I asked I think I was told that the NMEA 2000 protocol was not mature enough yet to make the switch. Not sure what they meant by that but it could have just been one of those answers that really meant: get out of here kid, we're tired of you pestering us all the time! I do know that the bus system we have was in the works way back when we started designing the Matrix units more than a few years back. That plus the design time needed could be why we haven't ventured into NMEA 2000 yet. Let me peg one of our Marketing guys for an "official" answer.