I spent six months building a single-page app (back when that was still an exciting sounding thing) for a major US financial institution; by the time we actually delivered it, the result was so watered down from the initial proposal that I could've just taken some screenshots from what my designer had produced six months earlier and put them in a PowerPoint deck and said "Done!" - because this was, in fact, what the VP at the company ended up doing, except they were screenshots from the web app we built that no one other than the VP himself ever used.
On the plus side, I became good friends with the VP and the project paid off a significant chunk of the mortgage on my first house.