Thanks for the feedback. I got a bit surprised by the "overengineering" part. Especially that one of the reasons for writing this piece were the "enterprise" grade systems I've seen, which had so many layers they were hard to grasp at all.
Please note the "adaptability" feature mentioned several times in the text. Applying each of the techniques/patterns/tests should always be a conscious decision. The tutorial explicitly demonstrates, for instance, that not all modules got a separate "infra module", because their logic didn't justified it.
