It all depends on whether you're talking about page-based or no-refresh web apps. For the former, you're right: the framework is less relevant, since the system

It all depends on whether you're talking about page-based or no-refresh web apps. For the former, you're right: the framework is less relevant, since the system is just basically responding to page requests. However, for a no-refresh app, the opposite is true, especially if the app is highly complex. The framework must manage the transfer of all code and content, which is where pre-fetching and factoring become particularly important.