Best to have a balance, I think: For loosely typed dynamic languages, docblocks on interfaces (function/method definitions, interfaces, etc) are a good idea.

Best to have a balance, I think: For loosely typed dynamic languages, docblocks on interfaces (function/method definitions, interfaces, etc) are a good idea. For languages that require types in their interfaces, it is helpful for larger units(classes, functions, methods) to have a summary comment. Inline comments are still very useful for explaining how and why of implementation details. While I reject the stance that you should never have comments, I also see cases where better names and simpler logic can alleviate the need for more comments.