Comment by ta1243
And many people are happy to not know what an IP address is either. That's fine.
I find it amazing how that lack of curiosity about how computers work extends into modern software developers, I guess that the majority of the industry nowadays are people that do things like "bootcamps" and go into it for the money.
I have no need for ipv6, however I wanted to know about it so spent a couple of hours setting myself up with it. I don't bother with the latest fads that last 3 or 4 years and then are replaced by a new fad, but ipv6 has been around long enough that it's clearly not a fad.
I have plenty of curiosity around how computers work. I've implemented compilers and interpreters, designed CPUs (I made a RISC-V CPU in Logisim which could run programs compiled with clang!), designed ISAs, back in university I had a lot of fun both writing a networking stack from almost-scratch (starting with only C and the raw ethernet packet API in Linux, building toy versions of ARP, IP, routing daemons and TCP) and writing a toy kernel, I have an ongoing game project where I'm writing the engine from scratch in C++ and using plain OpenGL to render, and this past year I've taken up PCB design and CAD. All this just because I want to learn stuff and make stuff. Don't assume that just because someone doesn't share your particular interests, they lack curiosity.
IPv6 has been around long enough that it's clearly a failed project. It's been 30 years and it hasn't even breached 50% adoption. It's not even at the hard part yet, which will be the long tail.