Upfront Clean/Blank Starter Theme?

Is there a clean/blank starter theme for Upfront? I've seen in mentioned in comments back in 2015 but nothing more recent. There was also mentions of creating templates and exporting them as child themes for Upfront. Is this still on the cards?

We're after something clean and blank for our students to be able to use without populating it with unrelated content (like full menus) and other stuff. We wouldn't mind if the image placeholders were simple white with sizing in the borders to indicate image size.