Some valid points, but he overemphasizes the new user experience. Logged in users answer questions and create value. Optimize for them. Badges, votes and tags e

Some valid points, but he overemphasizes the new user experience. Logged in users answer questions and create value. Optimize for them. Badges, votes and tags exist to encourage certain behaviors from that community. New users get answers easier than on any other site. Users who understand the value of the site will spend time to learn become valuable community members. Lowering the barrier to entry would lower the quality of the content.