I agree with the spirit of this article. After having changed focus 3 times in the last year I realized that I wasn't giving each project enough time to develop

I agree with the spirit of this article. After having changed focus 3 times in the last year I realized that I wasn't giving each project enough time to develop. There were other good reasons for shifting direction, but lack of traction shouldn't have been a factor. I believe that a common reason for changing direction early is that founders learn a lot about their problem in the first three months. Sometimes they learn that it's the wrong problem for them to tackle. It could still be a great business, but not a good fit for the founders. Prior research can reduce the chance of a "gotcha," but often you must interact with customers to really understand the problem. Yeah, customer dev techniques can speed this up, but it's a process that takes time regardless.