One thing that has crossed my mind several times is whether some kind of desiccant would work to pull the moisture out. I've seen desiccant breathers used on industrial machinery before, but have never heard of them being used on automobile engines. Something like that would really make a lot of sense in these machines. It probably wouldn't have been a cheap retrofit, but I wonder how much expense went into the warranty service that was done on these cars over the years, and how much of that cost could've been avoided.
Desiccant Breather Filters Maximize Equipment Life
I know the mantra for some is that these cars are designed to be driven at operating temperature for a certain period of time to burn off the condensation, but the reality is that for many of us, that just doesn't happen. Try to tell my wife that she has drive an extra 20 miles to drive to work, which is less than a mile away... (she usually walks, but not when there's freezing rain to deal with, like the last few days.) Plus, when we live in the central part of a city where you can drive from one edge to another in 15 minutes, short trips are the rule, not the exception.