This reminds me of a project manager I had. He promised a web app would be ready by x date. So he pushed and pushed. Never mind that the requirements had change

This reminds me of a project manager I had. He promised a web app would be ready by x date. So he pushed and pushed. Never mind that the requirements had changed, he had a deadline to meet. He delivered but the app was useless since the users had no use for the functionality it delivered. Sonos had a similar issue; a deadline became more important than a useful app. In my case, surprisingly the manager didn't get fired.