It is not about the language all the time.
It is at times also about the environment a language offers.
Stanza 0.8.22
Also known as L.B.
Stanza gathers to native code, but does not need specifying types.
Add them, and the language automatically carries out more robust code checking on your behalf.
It also uses an object system that doesnt employ classes.
It works with techniques and function overloading instead and makes it simple to hire co-routines for concurrency.
However, Crystal compiles to native code unlike Ruby.
Until now, it does not have parallelism, which means that everything is completed in one thread.
Therefore, it is a potential alternate language for that platform.
By using static typing and an actor object key in, Pony tries to address this.
So, it is easier to reason about what items are and the order in which they are accomplished.
source: www.techworm.net