alt Hacker NewsYes and it's ANNOYING. In Switzerland there is literally not one cellular network that issues IPv6 addresses. Also my workplace network (a school using some sort of Microslop solution) doesn't issue IPv6es.
I have a IPv6-only VPN with some personal services. Theoretically, the data can be transported via IPv4, but Android doesn't even query AAAA records if it doesn't have a route for [::]/0. So when I'm not home, I can't reach my VPN servers, because there is supposedly no address.
(I fix it by routing all IPv6 traffic through my VPN. Just routing connectivitycheck may suffice though).
Anything Microsoft lacking V6 is configuration issue - ever since Vista, Windows networking (in corporate) treats v4-only as somewhat "degraded" configuration (some time ago there was even a funny news post about how Microsoft was forced to keep guest WiFi with enabled v4, having switched everything else to V6 only)