Since enabling ipv6 its been interesting to see who uses what as i wonder about. The mainstream media seem glued to ipv4, and sites like wordpress and amazon have not taken the plunge.
I guess journalists also dont care that ipv6 cannot get there fake news (my blog) natively.
Overall i have no problems unless the site has an configured ipv6 thing on but nobody is at home on ipv6.
Big firms (not amazon) seem to have it, webhosters are spotty with ipv6 so its not really here in a big way yet for the mainstream.
The zoo has ipv6 servers finally working but that is another days posting.