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A data-driven analysis of IPv6 adoption across the internet in 2026, examining HTTP, SMTP, and DNS traffic. Key findings: only ~35% of the top 1M domains are IPv6-enabled for HTTP, fewer than half support IPv6 for email, and while 98.75% of TLDs use IPv6 for name servers, 70% of top domain name servers have IPv6 addresses. The author attributes slow adoption to decade-old decisions to disable IPv6, lack of critical mass, SMTP abuse-prevention challenges, and engineering schools that still don't expose students to IPv6. The piece concludes pessimistically, comparing universal IPv6 adoption to the long-running 'Linux on the Desktop' joke.

IPv6 Adoption in 2026