Lets suppose I have extended a class from magento core and used some extra classes to have a specific functionality. Here is the code (just example).
// core code public function __construct( \Magento\Framework\Model\Context $context, \Magento\Framework\Registry $registry, array $data =  )
Now in my module I have added an extra class. Say it's catalog session. Now it looks like this
// module code public function __construct( \Magento\Framework\Model\Context $context, \Magento\Framework\Registry $registry, \Magento\Catalog\Model\Session $catalogSession, //newly added array $data =  )
Now I know Magento will go through all extended classes until it finds out a constructor and those parameters will only use to inject dependencies. So now here it will find the constructor in my module first so it wont go to parent class at all and i need to ensure that I will add all parameters from my parent class.
Now my question is what will happen if Magento will change or add or delete any parameters of its core class which we are extending?