>But when you get to their scale, it's hard to make big changes like this in a safe way
Which only makes it more baffling that AWS still doesn't support IPv6 everywhere.
IPv6 is 8 years older than AWS. AWS is a decade old. Given that the inevitability of IPv6 is long known and that it's well known that as a rule changes get more difficult the bigger you get, I would have expected Amazon to start IPv6 deployment much earlier, back when AWS was much smaller.
Which only makes it more baffling that AWS still doesn't support IPv6 everywhere.
IPv6 is 8 years older than AWS. AWS is a decade old. Given that the inevitability of IPv6 is long known and that it's well known that as a rule changes get more difficult the bigger you get, I would have expected Amazon to start IPv6 deployment much earlier, back when AWS was much smaller.