About two minutes into it and everything is going fine.
I had one surprise: my vintage 2005 wireless access point, which makes no claims about IPv6 support, compatibility, etc.
I was confused at first to find it worked flwlessly with IPv6, but when I gave the issue a few brain cells, it dawned on me that it's a switch.
That's Layer 2 shit! IPv6 is Layer 3, so it's all good. I mean, you could drag out that old 10 megabit hub you bought in 1994 and it would do IPv6.
I'm sure someone, somewhere is even doing '6 on Token Ring.