Over here in America T-Mobile has been IPv6-only with NAT64/464XLAT since the early-mid 2010s.[1] My local cable internet company still doesn't support IPv6 in 2022!
yup, same for my ISP, they just completed a rebrand and finalized a bunch of mergers so maybe they'll finally see this as a cost saving measure and implement it.
[1]: https://www.internetsociety.org/resources/deploy360/2014/cas...