Sort of. There needs to be more intelligence at the client end though. I have a fairly decent IPv6 link but it can still fail in strange ways, that does not mirror the IPv4 link. Then again the IPv4 link has moved in mysterious ways from time to time.

Happy Eyeballs isn't quite fully prevalent and it hasn't seen all failure modes yet nor how to deal with them.

Internets is a really hard problem. For starters: define "connected". My wife will sometimes suggest that our internet connection is not working - she implies that her laptop (Arch Linux - obvs) is completely broken. What is really happening is that Mr Zuckerberg's thang has wandered off for a break and a smoko.

This morning it was our mail server. Hit the wifi kill switch by accident then internet will not work.

I've disabled the kill switch.