Metal keycaps are a less common but unique option for keyboard enthusiasts, and they have several benefits:

1. Durability: Metal keycaps are extremely durable and resistant to wear and tear, making them a long-lasting option.
2. Weight: Metal keycaps are heavier than plastic keycaps, which can provide a satisfying tactile feedback and give the keyboard a more premium feel.
3. Aesthetics: Metal keycaps have a sleek and modern look that can add a stylish touch to the keyboard, especially when combined with backlighting.
4. Texture: Metal keycaps can have a rougher or smoother texture depending on the finish, which can provide a unique typing experience.

Overall, metal keycaps are a premium and durable option for those who want a high-quality keyboard setup. However, they can be more expensive than plastic keycaps, and some people may find them too heavy or cold to the touch.