IP 4 addresses ran out years ago. Once upon a time, anyone could get a /24 block of addresses for free, by filling out a form. Before NAT, every computer behind the modem had to be issued a real IP address. You'd set the IP address using dip switches on the Ethernet card. So, the idea was, once a computer was issued an IP address, it kept it. Forever. Because changing IP addresses needed a service technician to physically come to the office to do it.

Telstra, the largest teloco in Australia, only issues IP6 address to all its mobile users. Been doing that for several years. They no longer use any IP4 on their mobile network. Also means they no longer needed to run CGNAT because every user gets a real IP6 address.

The second largest teloco Optus, still only uses IP4 and CGNAT exclusively.

My home Internet connection has both a single IP4 address, and 64 IP6 addresses. My DHCP server issues IP6 to everything on my home network.

iRacing has the option of using IP6 to access their servers which I use and the reduction in latency is dramatically lower.

The vast majority of my Internet use is already IP6. The server running my personal relay uses IP6. My connection from my phone to the relay you're reading this reply on is IP6.

I'll bet there's a shit ton of Internet users that are already using IP6 and don't even know it.