An enticing title, a good introduction, then... I'm a bit disappointed. Now, the problem with an alternate setup like this isn’t necessarily the individual pieces of technology selected. I definitely have issues with some of the ones in the example, but the real issue is how the choices were made and what the motivations were for using certain technologies.
It might be a bit promotional towards their own products, agreed. But it is just an example...
What's certainly funny is that our current enterprise stack looks a lot more like what you lay out they "should" look like, and we're constantly looking for making it leaner.
That's kind of comforting, really.
What particular elements are you having issues with? I.e. which parts aren't lean (yet) in your case?