HMVC VS Modular Separation VS Matchbox

[eluser]WanWizard[/eluser]
Some people do, some don't.

We're developing an application framework, where complete modularity is a must. In essence, every module is (or can be) a mini CI application, with its own models, libraries, controllers, and views.

I can also imagine that if you're a professional web developer, reuse is at the top of your wish list, because you can either work cheaper than your competitors, or you can charge for work not done (for this client)... ;-)

If you're developing a 'simple' standalone website, then maybe not. YMMV.