[This post is about the day that Glitch failed, and how that failure created the opportunity to make Slack. We're sharing it here (out of chronological order) to mark 12 years since the famous pivot.]“We have to shut down the game.” Stewart Butterfield said. I looked at him out of the corner of my eye. He looked exhausted. The result of years of long days and short nights pouring all of his substantial creative energy into Tiny Speck and the game it was conceived to create: Glitch. He also looke...