It depends on individual preferences and needs.
Backless chairs can be beneficial for certain activities, such as playing musical instruments or doing specific types of exercises, as they allow for a greater range of movement and flexibility.
However, for prolonged sitting or working at a desk, a chair with a backrest is generally recommended to provide support and maintain proper posture. Without a backrest, you may be more prone to slouching, which can lead to discomfort and even pain in the back, neck, and shoulders.
Ultimately, the best type of chair depends on the specific situation and individual needs. It is important to choose a chair that is comfortable, provides adequate support, and promotes good posture to minimize the risk of discomfort or injury.