Why is the use of NAT discouraged by IPv6?

The use of Network Address Translation (NAT) is discouraged in IPv6 because the protocol was designed to provide a vast address space, allowing every device to have a unique global IP address. This eliminates the need for address conservation methods like NAT, which can complicate network configurations and hinder end-to-end connectivity. Additionally, IPv6 promotes simplicity and efficiency in routing, which NAT can undermine by introducing additional layers of translation that can affect performance and security.