It is mentioned in this article about the inception of AWS's custom silicon: https://semiconductor.substack.com/p/on-the-origins-of-aws-c...

> “We use the terms one-way door and two-way door to describe the risk of a decision at Amazon. Two-way door decisions have a low cost of failure and are easy to undo, while one-way door decisions have a high cost of failure and are hard to undo. We make two-way door decisions quickly, knowing that speed of execution is key, but we make one-way door decisions slowly and far more deliberately.”