Launderess
Thank you for your interesting answer.
That's exactly my question.
I mean, it's known that nowadays nobody uses washers or dishwashers that would need a floor drain but, what about cleaning? Of course, we can use mops or floor washers like the Hoover Floormate or the Bissell Crosswave or others, but what about the good and old "wash using water".
One of the things i miss the most from Brazil is the floor drains. I used to use a pressure washer to wash the bathrooms in my apartment in Brazil. actually the whole apartment floor (porcelanatto) was meticulously designed to be slightly slant towards the drains in both bathrooms and the balcony.
All my furniture had high legs to make it much easier.
Once in a wile, it was super easy to simply use a garden hose and wash EVERYTHING, i mean, the whole apartment, being careful to avoid spraying the furniture or the walls.
After everything was done, i wouldn't need to worry about using a squeegee because all the water would slide straight to the drains.
Of course, that kind of "ultra deep cleanimg" is unthinkable here in the US with all the wood and drywwall constructions, but for example a toilet, it is MUCH better if you can simply wash it with tons of water.