My team worked on a project for about 18 months. I won't go into detail about what it was, but it was (and still is) badly-needed.
We worked with the top interaction and graphic design folks in the world for the aesthetics and interaction. We had many meetings, flying the whole team to San Francisco, several times a year.
When the project was in its final testing, the company got cold feet, and canceled the project. I had to lay off two of my engineers.
It would still, to this day, be the best of breed. It was designed about twenty years ago, in the early aughts.