[oarsinsync]

The IPv6 standard was ratified in the 1990s.

The Internet of the 1990s was very different to the Internet of 2020. The widespread surveillance of activity as it exists today was not a consideration back then, nor were there the same security concerns, making it a desirable property to have every device uniquely and globally addressable.

Privacy extensions were then ratified (RFC 4941) after 2007 as a workaround, and firewalls get applied on hosts and gateways to protect against bad actors on the Internet (which are significantly more prevalent today than 20+ years ago).

IPv6 is not a magic bullet. The increase in addressable space is definitely a positive. Pretty much everything else is up for debate, depending on perspective and use case.

I've been dual-stacking networks for over a decade. The easy part[0] is making the network work with both IPv4 and IPv6. The hard part is making everything else work.

[0] Easy is relative. I agree with everything listed in https://news.ycombinator.com/item?id=24059729 as additional sources of complexity and confusion. That's still just the mole hill at the start of the mountain.