There are (some very nice) text fonts which do not have math support. Though there are ways to 'remedy' this, such as the mathastext package and some others, these are hardly satisfactory. All accents ...
I'm writing a script (topic ring theory) where I have to set lots of quotients of algebraic objects. Usually I simply write M/N. However there are some cases where this is no easy to read (M+N/N or ...