Right, so: if one intends to sell a font, Metafont may not be a good idea, but if the purpose is to make a font for one's own use in book typography, and one is

Right, so: if one intends to sell a font, Metafont may not be a good idea, but if the purpose is to make a font for one's own use in book typography, and one is otherwise inclined to Metafont, then these concerns needn't stand in one's way. And perhaps it would be possible to make a vector-outputting version, if this has already been done for MetaPost.