Originally Posted by
TheReal Houdini
What's so modern about brazing? Bikes using "modern sophisticated manufacturing technology" tend to have riveted or glued FD hangars, if not clamp-on.
On most modern frames the term "braze-on" is just a figure of speech meaning there is a tab fastened to the seattube that the front derailleur is bolted to. It's a carry over from steel frames where the tab was actually brazed on but that's no longer literally true. As you noted, most current "braze-on" tabs are bolted, riveted or glued in place.