Is it me, or does this look like...
Someone forcing Windows 10 down our throats.
IPv6 is probably "too much" for normal use, or it would have been adopted LONG AGO (years).
For me, there should have been a SIMPLE method to accommodate the IPv4 address space in the new fangled IPv6. Unfortunately the path wasn't that clear, and the address space for IPv6 probably assigned an individual address to every grain of sand on planet earth and have a few left (billions and billions!) over.
Oh, well at least it isn't a proprietary thing that we don't know much about, or what is going ot happen next.