The Complete Rust Programming Reference Guide

Upsides

As a linked list, the principles are the same but slightly different. However, the major points of when the list is a good choice are shared with the singly linked list:

• Low overhead allocation per item (but more than the singly linked list).
• Item count is only limited by heap memory.
• Mutation while iterating is possible.
• Implementation is more complex but still fairly simple.
• Inserts, deletes, append, and prepend remain efficient.
• Efficient reversion.

This makes the doubly linked list a superior version of the two versions of linked lists, which is why it's usually the default LinkedList type.