Measuring ingredients by weight minimizes the number of measuring cups and spoons needed, as you can add ingredients directly to a bowl on a scale, zeroing it between each addition. This reduces cleanup significantly.
When you measure ingredients by volume (using cups and spoons), you need a separate utensil for each ingredient. This is because you need to scoop, level, and transfer each ingredient individually. However, when you use a kitchen scale, you can place your mixing bowl directly on the scale and add each ingredient one after another, zeroing the scale after each addition.
For example, imagine making a cake batter. Instead of using separate measuring cups for flour, sugar, and milk, you can place your mixing bowl on the scale. First, add the flour until the scale reads the desired weight. Then, zero the scale and add the sugar until it reaches the correct weight. Repeat this process for all the ingredients, including liquids. This way, you only need to wash the mixing bowl and the scale (which usually just needs a wipe).
Keep a small notebook or use a digital note on your phone to record the weights of your favorite recipes. This will make future baking sessions even faster and cleaner.