Of course, I forgot to mention that some laundry rooms I have seen & been in accommodate the more commonly right-opening dryer door opening, placing the connections on the appliance appropriately on that right, while the washer, there, to, in most installations, has remained along with all its connections on the left...
The floor plan in my mom's laundry is the same in a few other houses, so I as in the case of machines next to each other, see both door configurations (again, a lot of whom favor W-P/K-M) in that diagonally design...
-- Dave