I put clip on aero bars on my randonneuring bike a couple years ago, for hand relief, and it's a game changer. 6cm riser put body position exactly as in drops. I lose use of flats but not the corners, which is my second favorite position after the aero bars. Hoods for navigating low speed or riding with people, drops for fast technical stuff. My winter rando has no aero bars and I miss them a lot.

The surprising benefit, given my relatively upright position, is speed. Significantly faster. Maybe partially from aero and partially from comfort. I aimed for comfort, and got comfort plus speed.