I recently read up on the design of airfoils for the DR 109 and the caps 232.

They're not exactly what I thought they would be, namely the DR 109 having a roughly elliptical forward section and a straight trailing edge, and has been shown to have considerably less drag at low velocity (uplines) and increased drag at high velocity (downlines), and a clean preditcable stall.

I've noticed that on the whole we still tend to steer towards the NACA style airfoils, is there any reason for this? Has there been any development in the design of pattern airfoils in the last few years that I'm not aware of?