What is a common characteristic of both steak frites and millionaire's cut?

Steak frites and millionaire's cut are commonly known for their upgrade options, which enhances the dining experience for guests. In the context of a restaurant menu, offering upgrades allows customers to customize their meals, often adding premium ingredients or sides. This flexibility can cater to different tastes and dietary preferences, elevating the dish from a basic version to something more personalized and special.

For example, steak frites typically comes with crispy fries, but guests might have the opportunity to upgrade to a different type of side or add toppings that complement the steak. Similarly, millionaire's cut might have options for enhancements that allow diners to enjoy the dish in a way that suits their palate or occasion. This aspect of customization is a key characteristic that both dishes share, making the selection appealing to a broader audience.