Some say the open-concept home can be overstimulating and take a toll on mental health. (Getty Images) ...

For years the open-concept floor plan popularized by HGTV — which combines kitchen, dining and living spaces into one gigantic room — was considered the height of home decor fashion.

When you picture peak American luxury, do you envision large, sprawling living spaces? For years the open-concept floor plan popularized by HGTV — which combines kitchen, dining and living spaces into ...