:: @raphlinus’s spline is excellent for design time, but not that good for a final font format. B spline is on the contrary: it has very good mathematical properties and computes very fast, but cannot be easily controlled by artists.
Maybe, but this is probably a research direction that I'd be happier to see other people to pursue than for me to take on myself. I'll take issue with the assertion that my spline is not good for a font format. I think it has potential in that application.