The primary benefit of having thin fries is that they're way faster to cook, which saves McDonalds a stuffload of money. The downside is that they're drier IMO because there's no volume to absorb any flavorful juices into.
The surface area can be increased by making more fries
![](https://i.imgur.com/38Sslzq.png)
ITT: Arguing about French fries.
Astute observation. Do you watch Rick and Morty?