On: Learning Smalltalk from “Pharo by Example”

[Mikeb85]

Smalltalk uses multiple cores by forking processes and passing messages, just like JavaScript, Ruby, Python, etc...

[Rockslide → Mikeb85]

It is true that you can fork in Smalltalk. It is not true that such a fork results in multiple cores being used by the same VM concurrently. At least not in any of the "mainstream" Smalltalk implementations I know (which would be Squeak, Pharo and VisualWorks).