When I first started out, I would present very early—even incomplete—papers in seminars. Now I think that for me, doing so is a mistake. Presenting the paper too early is helpful for the work. But even though academics is a small field, people still only observe your work a few times. So early observations are quite informative. And what do people infer from seeing not quite complete papers at a workshop? How permanent is the effect on your reputation?
It is part of me understanding yet again that IQ is necessary for success, but not enough. You need all the details to be good, too.