The difficulty is not to make another 2 columns, if static html code will be placed there.
And the fact that these columns contain dynamic (changing) content. Which is very individual from the desire, and accordingly from site to site.
One person wants to have tags, another, categories, and a third last answers or statistics. This is the complexity. It is difficult to do something so that it is a constructor and that will suit many.
Moreover, the same should probably be not only on the central page, but also on the category page … And again. It is not recommended to do this plugin. The plugin must be installed, components, it is preferable. But the universal component (as a designer), which is suitable for many, here is the complexity.
I myself still think how best to do it. If we think of something, we will definitely publish it here.