... easier to build than ever. And getting people s attention is harder each time. Some ideas don t just feel unoriginal to me, they don t even feel useful. Recently, I ve really liked concepts like @ProblemHunt and @404tomb , where people can validate an idea before building, whether there s actual demand for it, or whether that idea has already failed in the past. How do you decide if something is worth building? And how much time do you usually ... ... usually solving a problem only you have. Comment from Samir Asadov(@samir_asadov): For specialist B2B products, "worth building" and "demand exists" tell you different things, and it matters which one you're answering. Demand validation (ProblemHunt, 404tomb