Is your feature request related to a problem? Please describe.

Not a problem per se, but the existing solution is unfavorable. The Articles module does not do this. The closest to this it CAN do is just list the articles with their respective categories in parentheses.

Describe the solution you'd like

How about a Category List/Blog menu item option that allows multiple categories in the same list (table). The List option would look like the existing table with sortable columns, with the addition of a new column to show the category. In the Blog view, just allow them to mix, which is already done well enough with the Articles module, but would be a proper and balanced solution with its own menu item type.

If the Articles module could produce a list like the Category List menu item, that would likely be sufficient since then it would be possible to put one for each category on a single page. This achieves almost the same solution without having to add a column for the category. The current display formats do not have the tidy table layout.

Additional context

Thinking about this, it could be a deep, dark well of problems handling subcategories. I need this desired interface for a site that will have quite a few writers (author, editor, publisher) who would prefer a one-stop shop to find everything they are maintaining. Category lists are also a good feature when someone just wants to "cut to the chase" and work on articles in a particular group of categories without having to browse through all the category blogs to find them.