Product managers are hired to build the future of products. However, when working on products and companies that are already at large scale, many Product Managers get stuck in ‘incrementalism’. This is the classic ‘local maxima’, and the proverbial ‘death by a thousand cuts’. Product Manager at YouTube, Seung Nam, talks about the challenges of building products at scale, and shares some challenges and lessons learned from rebuilding YouTube.com. Main takeaways that Seung discusses are how to create a vision, and share it, how to build design principles, and actually uphold them and how to back it up with complete data.