Windows Vista came out in 2007, and it explicitly had a dual-stack IPv4+IPv6 implementation. Around that same time, the BSDs were finishing up KAME, and Linux s

Windows Vista came out in 2007, and it explicitly had a dual-stack IPv4+IPv6 implementation. Around that same time, the BSDs were finishing up KAME, and Linux support was decently mature. That was 15 years ago. Software and OS-wise; with the exception of some features of Mikrotik routers + managed Meraki & Ubiquiti stuff just now getting onboard; the support is there. Node's using it properly now. I was able to update Pidgin to use it 10+ years ago. So I think we've got the software-side long figured out; we just needed to get the damn vendors on-board. I'm glad we agree on NAT sucking. Though given a lot of ISPs are doing DHCPv6 without fixed net-ranges to clients; a work environment does benefit from having ULAs still; sometimes even with NAT66. Performance & security-wise, IPv6 still wins that battle: most routers disable automatic inbound traffic, and you can pinhole traffic directly between hosts.