Mathematics has developed a very large alphabet for the very same reasons, and if it was constrained to ASCII, we'd be learning integrals today in the "Newtonian way".
If you don't see those properties as offering any benefits to a craft that is based on precision and that has new languages popping up regularly to cater to new expression forms, that's fine. I still believe it's an unexplored area, and we'll only see benefits once we start to make heavy use of the advances.
As to mathematics: do you imply that using a wider charset is akin to completely new mathematical methods? Or that a symbol needs to be one character? Both sounds implausible, I still must be misunderstanding...
As for maths, I was referring to the fact that notation (signs we express ourselves in in writing) matters, and that further advances in calculus were enabled by using a nicer and more concise character set vs doing everything with "fluxions" and "fluents". You seem to insist on keeping us restricted to ASCII, whereas I am open to exploring new approaches without understanding if there are any benefits first (I am not focused in RoI :)).