I've always found web dev tutorials short on explanations and not providing the big picture : a system level view. It quickly come to "do this, do that and you're done". I need to know the concept before the implementation. I'm probably lacking some CS background or so.
Illustrations in the article just clicked in my head and made me understand what I was not able to understand in other resources (like in the flask mega tutorial written by Miguel Grinberg). I've found explanations before code samples crystal clear and so helpful to review the code.
I can't wait to be at home to clone the repo and mess with it.
I can't speak for others but for me, this article is what was missing to go ahead in web dev. Thank you.
I've liked so much the illustrations that I've saved them on my smartphone.