What should "______" be replaced with to support multiple platforms after installing the CrossPlatformInput package?

The recommended replacement when supporting multiple platforms after installing the CrossPlatformInput package is "Input." This is because the CrossPlatformInput package is specifically designed to unify input handling across different platforms (like mobile and desktop). The "Input" class serves as a standardized method for handling user input, allowing developers to write code that works seamlessly regardless of the platform the game is running on.

By using "Input," you ensure that your application can adapt to varying input methods, such as touch, mouse, or keyboard input, according to the capabilities of the device being used. It helps to simplify the input management while allowing for future scalability and ease of development as new platforms emerge or existing platforms evolve.

TouchInput, PlayerInput, and MobileInput, while related to more specific types of input handling, do not provide the same level of cross-platform support and general functionality as the standard "Input" class provided by Unity in conjunction with the CrossPlatformInput package. Using "Input" makes your codebase cleaner and more maintainable across different platforms.