> A capital "A" is the same in any font; I can write a message in monospace and my interlocutor can read it in sans-serif, or tap in morse code and have it rend

> A capital "A" is the same in any font; I can write a message in monospace and my interlocutor can read it in sans-serif, or tap in morse code and have it rendered in hand- writing, in all cases the difference is immaterial Many typefaces are have problematic I/l/1 and O/0 characters, and that is material enough that applications avoid those characters entirely to avoid potential confusion. The problem is deeper than unicode: the fact that any codepoints can be rendered differently from client to client or typeface-to-typeface was always problematic, even back it was mostly ASCII.