Almost everything changes every year especially with technology. A better technology helps scientist and experts to developed a better product. I am not just talking about electronics and appliances but in general such medicine, food, agriculture, industry and many more.
As there are more updates on medicine, people gets better treatment just like treating acne and other diseases. You can get better acne treatment now compare to what it was like few years ago. I know a lot of people are frustrated with their acne even though they have tried different product already over the years. But like said, things gets better every year.