Non-racers appreciate light and comfortable bikes too (if anything it's much easier to load a 20 pounds bike on a car/bus rack than a 30 pounds one), this is why carbon is now even in the midrange consumer segment. And with the tubeless tires even on the road bikes nowadays, the magical suspension properties of a steel frame are hardly noticeable over the effect of lower pressure in the tire. So I don't think steel frames are ever coming back.