Well, OTOH, the fact that tens of millions of people have now been connected through firewall-free/disabled IPv6 for years, yet the (somewhat expected) disaster

Well, OTOH, the fact that tens of millions of people have now been connected through firewall-free/disabled IPv6 for years, yet the (somewhat expected) disaster of widespread hacking/compromises clearly didn't happen... which could mean that this is not that critical of a security feature as could be expected ?