When you’re a programmer, there’s way too much to learn. Think about when you wrote your very first “Hello, World!” program. For me, it was in fourth grade. We learned C++, and our teacher had written the program by hand on the blackboard for us to copy. We used Turbo C++, which we’d copy to a floppy disk so we can experiment at home.
This is a companion discussion topic for the original entry at http://amir.rachum.com/blog/2016/09/15/knowledge-debt/