As I recall, the Windstar had the best owner retention of any Ford of that time. In other words, a high percentage of owners traded in their old Windstars for new ones. So what did Ford do? Killed the products, of course.
Ah, yes, if only they would have used the magic carburetor instead. The mythical one from the 1980s that let cars get 50mpg or more, only to be destroyed when one of the Big Oil companies bought the company. As for 40mpg and 300hp, there are some getting close with the use of variable valve timing, tall OD gears, and low aero drag. But at some point, physics kicks in.
You are the only person I've ever seen say anything nice about the 1988-94 Continentals. I suggest that to this day, my 1989 Continental handles just as good (if not better) as almost every modern sedan but has a far superior ride. And that's including the fact I sadly had to delete the air suspension for aftermarket coils/dampers of questionable quality.
I had a 1988 Taurus GL with the 3.0 engine. Bought it because it was the first American car I had driven with ride and handling similar to a Euro sedan. Don't laugh! As an salesman I drove that car somewhere around 30K miles per year. Unfortunately the transmission failed at around 90K and the AC went south at around 110K. I eventually sold it after putting nearly 120K miles on the odometer. Oh yeah, that thing would get 28-30 mpg out on the highway, which would be pretty darn good even today for a car its size.