Costs are the big issue. If injection lowers costs on engines, even if the initial purchase cost is more, then that could be a good thing. That has not been the case in the airplane hobby, but they do use their engines differently. They are not as highly stressed and normally not leaned out for every ounce of power. Being racers, though, I can see car guys finding ways to alter injection; they will still run the wrong plug at times; they will find ways to still hurt their motors. Just because it's injected does not mean it can't be tuned. If it can be tuned, it can be screwed up.

I can kind of see where you are going with the brushless argument. I kind of think gas motors are a little different, though. Brushed motors are so darn archaic and crude, and they have such an obvious weak point. I don't see carburated vs. injected making the big leap that brushless did. I see injection more on the level of some hot new brush that is better enough to need it to win, but doubles the cost of a motor. I'm not sure if there is any engine technology out there that would provide us with the leap in longevity and reliability that brushless did for electric. I don't think injection will.