ICE aren’t growing much in size and are getting more and more efficient. Why not make them air cooled? Porches used to be aircooled, and those were performance cars with the engine in the back. I would imagine having an engine in the front might be easier to cool, no?
The minimal cost savings (and space savings) wouldn’t negate the massive horsepower drop and livability penalty that an air cooled engine would result in. Hell, even in the motorcycle world which still had some that were air cooled are moving even more into liquid cooling.