But diagnosing faults on my 15RC ECU is impossible without a super expensive Axone diagnostic tool, whereas it was quite easy without expensive tools to diagnose ignition problems prior to ECUs.
Not entirely accurate...
There WAS a commercially available and supported software/hardware solution that was sold by TechnoResearch in Michigan. They are my vendor still for Harley Davidson diagnostic software.
TechnoResearch (makers of Centurion and Alaris) was literally forced out of the Moto Guzzi arena by cheap ass bastards who wouldn't pay $125-$250 for the proper equipment but rather wanted to get onto the internet and jump onto the GuzziDiag bullshit and believing that "free" was the way to go.
Turned out they were all wrong, and several bricked their ECUs in the process, and caused all sorts of major problems with their motorcycles, and Sandro, (an Italian BTW), the owner of TechnoResearch, finally gave up trying to support a motorcycle marque that wouldn't support him.
It was a terrible shame indeed but brought on by cheap ass Guzzisti who wouldn't pay a fair price for a valuable tool, and ended up shooting themselves and every other Guzzisti in the foot, all because they wanted to be cheap.
It's this same mentality that has decimated the dealer network here in the USA. Nobody wants to pay for anything. They want everything for free or they complain about the dealer making any profit at all.
This is why I am not a dealer and never will be. I love Moto Guzzi, but I deplore many of their cheap ass owners.