Why didn't drum taro cake disappear in Hainan when I was a child?

It's too complicated to do. According to relevant information, packaged taro cake in Hainan was a traditional snack food when I was a child. The raw materials were taro and glutinous rice flour, which was a unique food in Hainan Island. Due to the complexity of the production process, the need for certain skills and experience, and the changes in the pace of modern life, this traditional drum-shaped taro cake gradually disappeared.