People know how to use computers just fine. Very few people need to know how the programs they use are implemented, or even the data structures they use. Fo

People know how to use computers just fine. Very few people need to know how the programs they use are implemented, or even the data structures they use. For most people nowadays, computers are for playing games, sending and receiving mail, watching videos, reading the news, shopping, and organizing your photograph collection. You don't need to know how to program to use a modern computer. Also, whether photographs or anything else use files stored in hierarchical directories is a historical accident. There are alternatives to file systems. For example, Squeak doesn't have files, hierarchically organized or otherwise, just persistent objects. EROS also took that approach.