> Many devices don't support it is probably one I consider true though. It's getting way better as the years go on but it's fair to say the world isn't past IPv

> Many devices don't support it is probably one I consider true though. It's getting way better as the years go on but it's fair to say the world isn't past IPv4 only devices in households by any measure. Typically embedded products are the worst. Home security stuff, point of sale gear, older or just crappy media devices, oddly some IoT type devices like a fridge. Plenty of gear also supports it but just very poorly. Of those that do not all understand NAT64 either so while they may support IPv6 but they don't necessarily work without IPv4 (this also getting better as more services move to supporting IPv6 too). This is very much the case. I used to compile statistics about various devices for our network gateway. ipv6 support was very hit or miss and was the root cause of many spurious support tickets.