Bret Victor had a great talk about how the source code file approach to programming is so antiquated: https://youtu.be/8pTEmbeENF4?t=1156. You edit code files containing long reams of code and you are constantly searching for variables and subroutines and data definitions.
This programming approach hasn't changed in 60 years. Even with today's fancy IDEs like Visual Studio and Xcode, we are still editing long code files. We are still debugging with complicated tools. We are still waiting for our compilers to compile our code.
It's like we're stuck in the Stone Age.
Smallltalk lays out your software project in a two-dimensional spatial format. You can much more easily navigate your code base. You don't have to wait for your code to compile. Debugging is easy because in Smalltalk you do live debugging in real time!
Smalltalk is one of the most productive programming tools in the world. It's so easy, even children find it accessible! In fact, Smalltalk was created by Alan Kay, Dan Ingalls, and Adele Goldberg at Xerox PARC specifically for teaching programming to children.