I can't shade smooth my curve/path 2.8 I'm following a video on youtube "Creating braid in blender" and he shade smooths the curves around 2:40. My model is the exact same as his and when I have it selected I go up to object, and go down and click "shade smooth". Only it does nothing. It's ruining my braid and bothering me to no end.
You certainly can Shade Smooth Curve. 


In the Transform panel ("T" menu).
Curve Data tab under Active Spline.


If it is not working as it supposed for you, probably you have some issues with your Curves.