Comment 15 for bug 167449

Just to clarify, our policy is to make things easy for
beginners AND give power to the professionals, without
sacrificing one or the other. Our Pen tool can be improved
in both ways, but the line/curve issue is not it, IMHO. It's
already about as simple and as powerful in that aspect as
can be.

One shape that has both lines and curves is so common that
we even have a special tool for it: rectangle with rounded
corners.