> Oliver Heaviside [...] even claimed Germans would get short sighted by reading Fraktur

Well Heaviside was a bit of a kook, especially in his later years, and that claim seems entirely in character :) My contacts with Fraktur are intermittent and brief, so I don't really have an opinion; I mostly encounter it in an old German-English dictionary which I occasionally consult, where the German text is printed in Fraktur. I don't have too many problems reading it.