Yes this is the latest in a list of interior walls threads starting with one in early 18 but here we are in 2020 with no interior walls and Ill bet I’m not the only person who still wants them.
I would be happy enough just having walls with the interior side on both sides so I don’t have exterior walls on my interior rooms.
I might pay for a DLC that gives a range of single sided interior walls that I can layer over existing walls and get a single look for each room regardless of what kind of wall is on the outside. This would be great for the base game walls which have interiors that just look like the unfinished backs of exterior walls. The DLC packs have some nice looking interior sides but they should come with interior only pieces.