The biggest challenge most web applications face is building a significant path to customers. Rather than going through customer discovery, customer validation, and then tackle customer creation, which can take months, I find it critical to start building and testing “significant enough” paths to customers much sooner.
You may not be able to apply others’ lessons to your business. But you can always use these lessons to spur thinking. Does this lesson apply to me? How? Can I abstract it in some way to guide my own journey?