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by marios 2600 days ago
NAT adds latency to a number of applications (VoIP, video conferencing, gaming). Not so much in the translate IP/ports and keep some state, but in connection establishment. CG-NAT only makes this worse (not to mention it's becoming impossible to troubleshoot when issues arise).

Users don't explicitely care because they don't know. It doesn't make much difference when viewing YouTube videos, but there's more to the Internet than cat videos.