Oh right! Nothing to do with me, then. That's a relief.
I'm not myself, though. I spent a while studying it for a MS certification back in 2011 and IMVHO it's a mess. Strong smell of "second system effect" to me.
https://en.wikipedia.org/wiki/Second-system_effect
I am not sure if it was "apenwarr" of Tailscale (?) but someone wrote a persuasive in-depth article a decade or so back about how IPv6 was missing an integral network-translation layer, for assembling topographically distributed virtual networks, and that this was a (the?) killer missing feature.
I am no expert, but it sounds plausible to me. Perhaps we need IPv8 to add that, in a backwards-compatible way, and make it truly compelling.