I'm building a SaaS right now, and one question keeps coming back to my mind: how do you know if you should keep investing your time into it or if you're just attached to an idea that won't work? I know there is no perfect answer, but I'd love to hear from people who have been through this. What were the signs that made you think: "This is worth continuing, there is something here"? "I should change direction or stop"? How much user feedback did you need before ...