As of April 2026, this is an old lecture, so it is better not to take it. It seems this instructor has created a new version for Next.js 15.x.x, so it would be better to take that one instead. As of 2026, the current version is 16.x.x. It's a shame because I wish this course would be updated. I believe old courses should either provide a link to the new course or be closed.