In what scenarios would it be more advantageous to use a "proper" programming language like C++ over phpGTK for desktop application development, and what are the key considerations in making that decision?

When developing complex and performance-intensive desktop applications that require low-level system access or high-speed processing, using a "proper" programming language like C++ would be more advantageous over phpGTK. C++ offers better control over memory management, faster execution speed, and access to a wider range of libraries and tools for desktop application development.

// No PHP code snippet provided as C++ is recommended for this scenario