I don't think curves are a technological problem for a segmented display. You can easily make curved segments and dots. Its all just an LED behind a window pain

I don't think curves are a technological problem for a segmented display. You can easily make curved segments and dots. Its all just an LED behind a window painted over with the negative image of the curve. In principle you could make a display that is optimized for OCGDU rather than EIFHTL. Much like latin characters, at some point a segmented display is just going to have to compromise on the tradeoff between correct an the number of parts. We see it work just fine casting the curvy latin letters to squares. So the real question I reckon is how much can you mangle the diacritics / curves / other parts and still read it? In other words, what is the bandwidth redundancy of this writing system?