This is really insightful. Thank you for giving it serious thought=). The main reason to make them different is I saw them as different use cases: the client-side folks just want a single script (oj.js) include to make things easy to get started with. The server-side people are already comfortable with the Node npm module system and so using `require` to include different files / modules made sense. I mostly didn't want to force everyone to use a command-line tool / Node just to use OJ.

That said, I completely agree and hope over time more and more people will embrace the server-side way as it makes downloading and updating plugins really simple. Maybe in time that path should be emphasized more.