Originally Posted by mhespenheide

I mean, I'm enough of an engineer to have an aesthetic appreciation for TIG-welded stems, but if I had a truckload of cash lying around, I might approach Passoni about making a quill stem for me. Their frames are welded, then ground down and smoothed to the point of looking like fillet brazing (as seen here):

https://passoni.com/en/made-to-measure-bikes