Why no new notations since 1960?

Writing consists of language and also notations, systems of marks that communicate meaning in a specialized domain. Examples of fields with their own highly developed notation are music, mathematics, architecture, electronics and chemistry. There are also minor types of notation, for example, welding, meteorology and finite state machines. Here's the question: all the notations I'm aware of were invented before about 1960. Over the past few decades, people have invented all sorts of fancy notations, but none of them have caught on in the applicable field. Why not? Some answers: Of.