Stuxnet v2? Speculation I know, but wow, IPv4 came back up, but IPv6 is completely out, looks like 48 million devices? Compared to IPv4's 47 thousand (wow that's insane).

Looking at IPv6 its not 0 exactly, looks like probably censorship, only some devices allowed online? Some other comment mentioned there's calls to protest again today.

They are almost certainly attempting to shut down communications due to the ongoing anti government protests.

No, it is the Iranian government shutting down the internet.