What are the advantages of using a cottered crank in a bicycle's drivetrain system?

The advantages of using a cottered crank in a bicycle's drivetrain system include increased durability and strength, as well as easier maintenance and repair compared to other types of cranks. The cottered design allows for a secure connection between the crank arm and the bottom bracket spindle, providing a reliable power transfer while riding. Additionally, cottered cranks are typically more affordable and widely available, making them a practical choice for many cyclists.