A steam drier has a special cycle that releases steam instead of water into the bathtub so as to wash your clothes. Whether the excess price of a steam cycle is justified depends on what you require and how you use your washing machine.
Steam deep cleans your clothing in a way that detergent and water cannot. The steam penetrates the fibers and also lifts out stains and dirt, while also killing bacteria and allergens like dust mites. This type of cleaning is beneficial in case you or family members suffer from asthma or allergies, have a weakened immune system, or regularly have laundry items that could be contaminated with bacteria, like medical scrubs. The steam cycle can also be used to securely clean fragile things and prevent a trip to the vacuum cleaner, saving time. Based on the quantity of clothing you would usually send out for cleaning, then it could also save money over the long term.