Yes and no. The necessity of customizable buttons in a mouse can be a matter of perspective. They are not necessary if you have been living without them. However, once you experience the convenience of adding buttons and incorporating them into your daily workflow, you can’t go back and now need those extra buttons. The usability of these buttons also depends on how intuitive the accompanying software is, as it determines how effectively you can customize and utilize them to enhance your productivity and ease of use.