I could see it happening, as well as 2x and 3x drivetrains returning. Why? They are elegant solutions - direct mount rim brakes are plenty good for just about anyone road riding up to 32 ish tires and front derailleurs will always give more gears than without.
having said that, unless A high profile rider brings these technologies back in fashion, I don’t think the general public is brave enough to set it’s own trends