Hi Robert,<p>I&#x27;m not sure what you&#x27;d like to see discussed from the article. To me, it read like an overview of something I already knew.<p>It&#x27;s one of those things where if you know it, you don&#x27;t need to hear about it. If you don&#x27;t know it, hearing about it won&#x27;t make sense anyway.<p>I can see this being part of a course for beginners but frankly - people will figure out what interfaces are for and what leads to problems by writing enough code and&#x2F;or seeing how good libraries&#x2F;frameworks tackle the problems they had difficulty with and learn from that.<p>My 2 cents.