Yeah, the paper made me wonder how the typical modern graphics library even draws stroked béziers. Surely, when the line weight is greater than 1, you have essentially two parallel béziers you are filling in order to rasterize a fat stroke.
You don't need to represent them as curves, though. Yes, turning the parallel curve of a bezier into a smooth curve is difficult, but turning it into a sequence of line segments is pretty easy, and something you can do at whatever level of resolution you want.
