For all of the bullshit that is Comcast and their ongoing mission to fully enshittify every single aspect of last-mile Internet delivery at the expense of consumers and taxpayers, I will say that at least they've had great IPv6 support for well over a decade at this point.
Yeah, I'm a Comcast customer and I'm very happy with their IPv6 support. The only things I would want different are a prefix larger than a /60 (say a /56), and the ability to have a permanently assigned prefix on my residential connection (but that's unlikely, I know). As evil as the Comcast business people are, their engineers clearly are trying to do right by customers.
