[twic]

There is exactly one such reason: programmers. Python programmers were given operator overloading, and did a good job with it. C++ and Scala programmers were given operator overloading, and did a bad job with it (eg << in C++'s streams, ^ in Scala's specs2).

I have never heard a convincing theory of why some language communities were careful in their use of operators, whilst others went overboard. In the absence of such a theory, it's a risky feature to add.

[stelonix]

Well, it's time to disallow functions, since someone can misuse their names. And exceptions, since someone might use it as goto. Might as well get rid of non-primitive types, there might be a very bad person willing to name a class with a completely meaningless name.