Alternate Magento 1 Configuration Model
There’s a handful of classes you can’t rewrite in Magento 1, but more modern version of Magento provide a way to slot in your own configuration class. I still wish I lived in the alternate universe where Varien had the resources to take the brilliant parts of Magento 1 and refine them into a solid, stable, PHP framework. They were really ahead of their time in so many ways.