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Can you guess the top 5 countries by IPv6 usage?
(beehaw.org)
spoiler
Via https://radar.cloudflare.com/adoption-and-usage
Here is a different source with slightly different results https://www.6connect.com/blog/global-adoption-of-ipv6-top-ten-countries/
For fun you can comment your guesses first :)
The wrong lesson learned was, "don't use IPv6." Which has, to a large extent, hurt the uptake of IPv6 everywhere, because "if the government doesn't use it, we're not going to use it." Rather than do something sensible, like enable the IPv6 functionality of the firewalls and configure them properly.