"IPv6 is the next generation of the Internet Protocol (IP), the successor to IPv4."

This is a misconception. It is not the successor to IPv4, it is an alternative. Maybe the alternative is so good it will eventually make the older extinct, but it does not look like that

I agree with you. While I can see some benefits to v6 on the internet, I find v4 to be miles easier and cleaner to work with in a LAN setup. Unfortunately though v6 oversteps on LAN features and makes bridging v4 and v6 way uglier than it should.