What are the differences between joint compound and plaster, and which one is more suitable for repairing drywall?

Joint compound is a modern material made of gypsum and other additives, used for finishing drywall seams and repairs. Plaster is a traditional material made of lime, sand, and water, used for creating decorative finishes and repairing walls. Joint compound is more suitable for repairing drywall due to its ease of use and compatibility with modern construction materials.