You can also look at another study
that assesses the impact of carrier-grade nat on network applications.
However, despite the active use of this technology, there are prejudices that modern NAT444 adversely affects the work of many popular internet services. It is believed that the use of NAT leads to the loss of end-to-end addressing. Further, network protocols operate on the assumption of network architecture, which with the advent of NAT, cease to be executed. Indeed, many internet protocols and applications depend on end-to-end addressing from the source to the destination node. Therefore, some applications are considered to be incompatible with Network Address Translation
because the source of IPv4 address is changed before the packet has time to reach the destination node.
testing revealed that many basic and popular Internet services, such as Youtube, Netflix, PS4, Skype, Viber, Facebook Messenger, WhatsApp, Slack, etc. work in the exact same way without any changes or delays. The NFWare team observed that the performance of all listed applications with CGNAT and without the use of this technology had the same results. This would prove that NAT444 technology no longer has a negative impact on various applications, despite all the fears and warnings. Telecom operators can be absolutely sure that CGNAT can solve all of the current tasks that they face.