[nurettin]

Ruby can be used the same way as perl when building commandline tools that use repl and regex. ($~,$1,$2, etc.)

You can also add new methods to classes and you can override callbacks such as method_missing to respond to method calls at runtime.

You also have a choice between lazy and non-lazy versions of map/reduce/select.

You also have a rust interface to create gems that run native code.

You also get an extensible build tool called rake.

You also get RoR5 if you enjoy that kind of thing.

[steveklabnik]

You can write Rust extensions to Python as well, though the higher-level interfaces aren't quite as far along in Python yet. There was a talk about it at PyCon last year.

[nurettin]

Ah, I actually forgot about the rust-cpython package. The project is alive and it works with python3, too.

That brings me to another point I want to make. There is no community-breaking divide between ruby versions. People usually pretty easily port their 1.9 gems to newer 2.x APIs without breaking much.