Hi Lee, I have a question on how do you develop a mental model of what is happening behind the scenes in an application. Let's say a creat react app which has a bunch of fetch API calls and map reduce destructure and lot of things happening under the hood. How do one create a mental model of it so it becomes easier to add or implementation of any more features to that app.

My First OS was windows 95. I used it for almost for 7 years. It had a floppy drive and would give shocks every now and then. It had a Pentium 4 processor and 128MB RAM.