Magento needs more features of ajax

I can not blame Magento for its slow. It is such a big system aim to fit in all sectors of business. After all, after optimisation, Magento can achieve a decent speed on a entry level of server. However, I think Magento developers should bring more features of ajax into Magento. Fore example, when adding a product to compare, Magento give a success message “Product brah brah successfully added to compare list”. Magento currently reload the page to show the message. It is absolutely not necessary. Why not use ajax?