It's what local folks call a "Shandon bathroom," after the neighborhood where most of these 1930s homes were built. I grew up in a Chicago flat, then a small bungalow in which the sole bathroom was not much bigger.
I'm tweaking it -- replacing the floor tile, patching and painting the walls, and changing the palette to gray from yellow. I frosted the bottom half of the window, which I think is a genius idea.
I'd rather be shifting the sink, toilet and tub around, adding a heated floor, new drywall (and insulation!) and adding a bit of square footage with a pocket door.
I gotta wait until next spring, when my tax money comes in and I'm on a little better financial footing. So, for now, tweaking.