Pancake Lenses Are Fantastic. We Need More Of Them Now

The analog SLR era wasn't exactly flooded with them, but most manufacturers did have at least one or two pancake lenses in their lens lineup. But as digital photography began taking prominence, these compact, almost cute lenses pretty much vanished. Why have Nikon, Canon, and Sony become reluctant to manufacture pancake lenses these days, especially for full-frame cameras?