"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.
Regardless of whatever other things may be better or worse about ipv6, it's still a reality that as we continue connecting more and more devices to the internet eventually ipv4 addresses will become so scarce and valuable that a not-insignificant minority of residential customers will be behind such aggressive CGNAT that the internet will become nearly unusable unless a majority of the services they are using support ipv6.