If you are interested in mathematical notations, check out Terry Tao's comment [0][1] on desirable properties of math notations. It was discussed not long ago [2].

[0] https://en.wikipedia.org/wiki/Terence_Tao

[1] https://mathoverflow.net/questions/366070/what-are-the-benef...

[2] https://news.ycombinator.com/item?id=23911903