Gosh I hate hero images so much. Wasting anywhere between 30%-100% of the above-the-fold space on an often completely meaningless stock photo or illustration with a loose connection to a keyword — who the fuck likes that?
I love hero images, but I get that on many sites it pushes the actual content below the fold, which isn't ideal.
Reddit's old vs. current design is probably one of the biggest examples of the user philosophy changing overtime. Not really a "hero image", but the focus of presenting text with small thumbnails to huge thumbnails and a small header likely follows a similar philosophy.