Yeah, I also start getting confused by reusing of the syntax. Now there's also a proposal to use { 1, 2, 3 } to represent sets - but {} is already used for blocks of code and for maps, so now that will be essentially a 3rd use case for curly braces.

On the other hand Ruby has already such a extensive syntax that it's hard to come up with something else that would not already be taken. -> represents lambda, >> is a valid method name, etc.