One of the most underrated features of a camera body are the buttons and controls. Lower-end cameras tend to have fewer buttons. Instead, they allow you to change settings by navigating a menu. Higher-end cameras have more buttons dedicated to specific settings, allowing you to more quickly change a setting. For example, the Canon T3 lacks an exposure compensation dial. If you want to adjust the exposure compensation, you need to navigate the menu system. Higher-end cameras have a dedicated dial that you can quickly adjust with your thumb. Even though adding controls can make a photographer much more efficient, very few people spend extra money on a higher-end camera just for the additional buttons. Instead, you can think of more advanced controls as a free bonus included with the higher-end cameras.