Door handles should not retract at all. Anything that retracts comes with a risk that they get jammed in a retracted position due to rust, dust, debris in the m

Door handles should not retract at all. Anything that retracts comes with a risk that they get jammed in a retracted position due to rust, dust, debris in the mechanism, maybe heat, etc. Even if it's not jammed much, it's hard to get leverage on a flush surface, especially when you're panicked. I just can't see that risk being possibly worth a small aerodynamic efficiency gain.