I have been building things long enough to know that the best way to validate whether you are on the right track is to watch how the world responds to the problems you are trying to solve. When 10,500 nurses walked off the job in New York City — and stayed off for five weeks in the middle of winter — I paid close attention. Not as a competitor watching a market move. As someone who has spent a lot of time sitting across from healthcare workers, administrators, and safety lead