Windows 10+ has a native 464XLAT implementation for use with cellular networks as well.
Most of the pieces are in place already but not all clients operate the same way. I think there's stil some streamlining to be done before any ISP will bother implementing such technology into their routers.
Windows just nails it. Now that I'm spending most of my time on the desktop with Linux, I've tried to get the same results tere and move to IPv6 only: with clatd it's mostly been a smooth ride.
One small issue: I think T-Mobile is giving /56 but for some reason the Qualcomm 5G card only gives /64 through wwan0.
However, checking the IPv6 returned by qmi with `--wds-get-current-settings` returns a different one each time, so I think the embedded Linux inside the Qualcomm cards does SLAAC and the equivalent of net.ipv6.conf.wwan0.addr_gen_mode=3 to randomize the IID for EUI64
Most of the pieces are in place already but not all clients operate the same way. I think there's stil some streamlining to be done before any ISP will bother implementing such technology into their routers.