"washers. how many times are you really going to adjust your stem height? "

daily with threaded. Scootin round town, keep my stem one height. Gofast saturdays? drop it an inch or so. Ridin my little girl to get an icecream cone, raise it up an inch or so. During a century I might change my height several times in a single ride. Only takes about 8 seconds.

infinte (height) adjustability of the quill far outweighs the therotetical advantages of the threadless (imo)