I have laundry. It's not a problem, so long as you don't place clothes hampers in the house! You can have the washer and dryer so that your house can look 'complete'. I mean, how many people today don't have their own machines, right? Laundry only gets backed up if I have the hampers placed and they get full. So, you could have the look of a nice laundry room, without the trouble and hassle of having to actually have your Sims do the laundry.
Yes, I just avoid placing the hampers. I don't make laundry rooms often, but occasionally download a house that has one.
