Sorry, my dyslexia prevents me from reading the original article in full. However I have thought about this topic and experimented with Post Formats at length and I have my own theories as to why they are not used much and why they are not a wise thing to pursue. It all boils down to one basic point: The use case scenario is not one that people are asking for.

Let's take the Image and Video post formats as an example. The use case scenario here is clear: You create a post that only contains an image or a video. Nothing else. This is not a common thing to do nor is it recommended. I'm sure some will say this is not a correct interpretation. I beg to differ and I can show you why:

Create a couple of video posts containing a videos and content and apply the Video post format. Then activate the Twenty Fourteen theme, add the Post Formats widget to your sidebar, and point it to the Video post format. Finally visit a single post in your site and look at your sidebar. What you'll see is the entire post displayed including video and text and whatever else you put in there.

At first I thought this was a mistake, but when I look at the code for other post format themes it is the same. Clearly the idea here is that people want to just post an image or a video and nothing else. While this may be how some people do it (especially people who come from Tumblr or similar services), it is not the standard method of posting content in WordPress.

To put it another way, the Post Formats feature is for a small subset of WordPress users.

Personally I think Post Formats should be removed from core and added as an optional plugin. What's needed in the core is support for post templates equivalent to page templates. Post formats is something else and imho something that will never catch on.