[commandersaki]

Thanks to CGNAT we have shifted from a 32-bit to a 48-bit address space (since the port is now part of the address).

Ipv6 really only serves to shed load off CGNAT since we rely on the continued use of v4 addresses since v6 is not interoperable with v4.

But why should Reddit support v6? For the greater good of v4 by reducing pressure of CGNAT for dual homed users. But wait, who are the dual homed users you may ask? Mobile users. And it will only be mobile users since autoconfiguring residental networks to dual home is not going to happen. But Mobile carriers have full control of addressing and TCP/IP configuration of handsets, and so they can easily deploy usable v6.

So the smaller sites shouldn't bother with v6 because they're not an essential part of the Internet with large traffic. But a site like Reddit can reduce enormous pressure for mobile carriers to deliver use of the Internet.