In what scenarios should developers consider moving away from WordPress for more complex functionalities in PHP applications?

Developers should consider moving away from WordPress for more complex functionalities in PHP applications when they require custom solutions that are not easily achievable within the constraints of WordPress. This could include scenarios where extensive customization is needed, performance optimizations are necessary, or when specific integrations with external systems are required.

// Example PHP code snippet implementing a custom functionality outside of WordPress

// Include necessary files or libraries
require_once('custom_functions.php');

// Call custom function to perform complex task
$result = custom_function();

// Display result or handle further processing
echo $result;