The lesson explores the use of the `multi-writer` function from the `io` package, which allows simultaneous writing to multiple destinations without excessive memory use. By leveraging this function, developers can easily manage the outputs of different count functions—like counting bytes, words, and lines—by directing writes from a single source to various writers. The process includes creating designated pipes and utilizing the `io.copy` command while ensuring readers are closed properly to prevent deadlocks. Though this method is conceptually easier than previous approaches, it may result in slower performance due to multiple iterations and the overhead of goroutines. Understanding the performance implications of this algorithm is essential, and upcoming lessons will address how to benchmark and compare its efficiency to simpler implementations.