Washer debate in wheel building

I have heard both sides in terms of using brass washers at the spoke/hub connection in wheel building

(for washers)
"In order to prevent the play which causes damage, professional
wheelbuilders use brass washers.
The result is a spoke hub joint free of play. You seldom see a
professional wheel without washers."
Gerd Schraener, The Art of Wheelbuilding 

(against washers)
"very thin flanges can lead to spoke breakages. One solution is to use
brass washers as packing between spoke and hub flange. This was common
old old generation hubs, but all of today's aluminum hubs have
adequate flange thickness, making the use if washers unnecessary"
Roger Musson, Professional Guide to Wheel Building