[peq]

At first "mathy" objects seem not so important, but it also involves:

- Vectors, matrices

- Immutable containers (lists, sets, maps, etc.)

- Domain specific languages (regular expressions, constraint languages, etc.)

And without good support for matrices, the data science and ML people will just use Python instead of Java to build their libraries. And then everyone will use the language with the best libraries, even if they don't use matrix math in their code.

For regular expressions, you have to use a DSL embedded in Strings in Java instead of using operators like | as operator on regular expressions directly.