> IMO, IPv6 solved the address pool size part of the issue, but it made managing the v4 to v6 transition very painful.

There is no easy way to transition from IPv4 to any kind of IPng; see my other comment:

* https://news.ycombinator.com/item?id=50288091

You can still control access. Most home routers have firewalls that work a lot like V4 port forwarding except they don't have to maintain NAT tables or use as much CPU .

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