If yours are ancient they are probably one piece forged construction, they aren't any more they are stamped out of steel sheets and the handles are welded on. (Unless you buy the very top of the range)
All the ones breaking that I know of have been dropped and snapped at the handle, (the weld) none had been near a diswasher and all were reasonably recent purchases or gifts.
There is quite a lot of instances reported online although I appreciate it is difficult to know how widespread the issue is and anecdotes aren't statistics