I didn't read the full article (yet), I only skimmed it so far. I think the author is trying to demonstrate one or more principles, he/she does that with simple

I didn't read the full article (yet), I only skimmed it so far. I think the author is trying to demonstrate one or more principles, he/she does that with simple examples so not to overload the reader. So, yes. Glancing over the examples, they might seem futile but I would assume that is a much larger application with a lot more complexity that the principles demonstrated become more useful. Another example of this is explaining Object Oriented Programming, which with simple examples seem bloated and can be achieved with a much simpler approach. However, in the context of a large, decoupled enterprise system its a totally different thing.