Paul&#x27;s a perfectionist. Sure, the collections aren&#x27;t perfect, and we will continue to improve them, but you should keep some background in mind when watching that video: he was pretty frustrated with issues in Scala development not directly related to (but, I guess, embodied by) the collections. Some of the stuff he pointed in that video was already deprecated at the time of his presentation, and we&#x27;ve fixed other issues since. We have to strike a careful balance between fixing &quot;obviously&quot; wrong code and breaking code that had come to rely on the perhaps not-so-obvious wrongness...