Component-based file structure is firmly in the "good" column for me. It makes small components much more feasible.

If you're forced to split out your view, your template, your stylesheet, your controller, your model, your business logic, et cetera into separate files you are forced to keep components large.

However, if you have a component-based structure, whenever you notice a very small piece of common functionality it becomes trivial to create a new component for that functionality. You end up with a very large number of very small, very easy to understand components, with clear areas of responsibility.