Usually people don't just vectorize the font and rerelease it without any modifications. Usually there's some small stylistic changes made, which most people wo

Usually people don't just vectorize the font and rerelease it without any modifications. Usually there's some small stylistic changes made, which most people wouldn't notice, but type designers are attuned to. So then it's a substantive change. I think this is the logic behind the legal decision: that the glyphs put constraints on things enough that it would be difficult to navigate legally in many cases.