[eznzt]

>CGNAT is really painful to operate.

For whom? There are lots of providers (for example Huawei) that offer turnkey solutions for ISPs to painlessly roll out CGNAT.

[lolc]

CGNAT means extra memory and extra processing on network nodes. Less freedom to switch routes. Operating something extra that can only degrade performance, but not improve, is painful.

The current situation is that the ISP can lessen load on their CGNAT solutions by providing IP6.