As for IPv6, yuck - it's the most brain-dead nomenclature ever written - if we'd tried* to make IP addresses as impossible to use and communicate as possible, this is wheat we'd do.
and even better...
ipcalc 192.168.0.0 255.255.255.0
There's also ipv6calc
IPv4 scarcity is going to increase centralization as it’s going to cost more than ever to even operate an AS.
It’s pretty much going to be impossible to run an AS as an individual too for the same reason as a /24, the smallest block that you can pretty much announce on the Internet already sells for 5k+.
IPv4 fixed addresses are a service, and their scarcity made them even more costly, so I don't see how IPv6 is becoming widely adopted anytime soon: it's conflict of interests plain and simple.
At this point the main thing holding back IPv6 adoption is enterprises that don't want to deal with it and home users with routers that don't have v6 function by default.
We can then think if we want some aspects of IPV6.0 also.