Cells

From CakePHP 3 docs:

"Cells are ideal for building reusable page components that require interaction with models, view logic, and rendering logic. A simple example would be the cart in an online store, or a data-driven navigation menu in a CMS. Because cells do not dispatch sub-requests, they sidestep all of the overhead associated with requestAction()."

In my opinion this allows to solve current problem in codeigniter of creating reusable logic without the need for controversial HMVC support.