In 40s pages it explains most of the programming language, features and purposes.
> type safety, immutability, fp, thread, channel, mutex, GC
It really makes me concern about my favorite languages, supposing I am making a mapping to their existing features for the purpose and somewhat, turns out just to make us happier when programming. In contrast, this one is for solving real-world problems and makes a better future of a big-big-world.
Some say rust is a happy programming language. I don't know, time will tell.