I'm 58 and I think I'm about 2.5. I commute, but I don't enjoy riding upright for very long. A glasses-mount mirror helps me see behind me in such a forward position. I will use the drops in heavy headwinds (or for varying my hand position for hand relief)which lowers my position further but that inhibits situational vision enough that I won't do it in traffic. I also used to have aero bars on my MTB for hand relief and that was very, very comfortable to stretch out forward, but lousy in traffic, both for visibility and maneuverability. Ironically, I could hold the elbow-rests for very upright riding. But I converted the MTB to drop bars last year since my hands can't do straight bars comfortably any more.