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But frameworks were never made for solving that problem. Partial content download is a nice addon, but not a goal. The goal of any framework is providing of code structure with some concepts (like MVC) to ease development. Without that it would be a library.
You can write MVC app yourself, but that's like development of a bicycle: it may be ok if that is your goal, but if you need to make app fast and avoid stupid bugs - it's more effective to use frameworks as they are well designed and tested. Neglecting to use frameworks is like preferring assembler.