1) Magento Enterprise infrastructure needs to support more servers, orders, users, products, stores, and orders per day for large companies. 2) The challenges include maintaining good performance as the infrastructure scales. Imagining closing your eyes to see how it can be improved. 3) Test results show that using nginx, PHP FPM, and memory caching can make homepage, category pages, and detail pages 62-280% faster on average compared to traditional configurations.