I agree that rugs can make a bigger difference to a layout than people often realize. I’ve found that modern living room rugs work particularly well for open-plan spaces because they visually connect the furniture and help define the seating area without making the room feel divided.

I think sizing is definitely one of the trickiest parts. A rug that looks balanced in a floor-planning tool can feel completely different once furniture, walking space, and room proportions are taken into account. I usually recommend considering the furniture arrangement first and then choosing the rug size around it.

For me, rugs are part of the layout rather than just an afterthought. The right color, texture, shape, and size can make the entire room feel more cohesive.