>>>> Backbone models, by default, don’t enforce any structure. You don’t have to declare anywhere what properties you’re going to store. As a result, people inevitably start saving miscellaneous properties on models from within a view somewhere, and there’s no good way for a new dev starting in on the project to be able to read the models and see exactly what state is being tracked.

What a terrible lead-in example for justifying Ampersand.js. If you want structure, why not use a strongly typed language that transpiles to JavaScript? I don't understand how all these micro libraries you created get you any assurance of what you were after.

Can you please explain further why I would use Ampersand.js? Coming from TypeScript, I just see no substantive argument. If I were a Backbone developer who had monolithic dependencies, I could see your argument. I also get AMD modules or CommonJS modules for free with TypeScript.