The main problem is that no one makes a slim, elegant, attractive threadless stem. The standard ones look like scaffold fittings. The nicest custom ones look like fancy plumbing fixtures.
Custom.
Here's one from Brian Chapman:
https://c1.staticflickr.com/5/4487/3...8f87a0fd_b.jpg
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If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.