The goal today isn’t to make single stack IPv6 internet practical, it’s to make dual stack ubiquitous. Once that’s achieved, the cost differential, and the increasing technical burden of maintaining IPv4 hacks, will reach a tipping point where it’s relegated to legacy status, but this is at least a decade away, with likely another decade of inertial decay of public IPv4 after that.
The goal today isn’t to make single stack IPv6 internet practical, it’s to make dual stack ubiquitous. Once that’s achieved, the cost differential, and the increasing technical burden of maintaining IPv4 hacks, will reach a tipping point where it’s relegated to legacy status, but this is at least a decade away, with likely another decade of inertial decay of public IPv4 after that.