Honestly, when could we ever retire IPv4? We've had, what three or four decades now, of building the world's infrastructure on it. What's a realistic scenario t

Honestly, when could we ever retire IPv4? We've had, what three or four decades now, of building the world's infrastructure on it. What's a realistic scenario to retire that stuff even if everyone gets on IPv6 in 10 years. Another 50 years? 100? 500? Our great-great-grandkids will still be troubleshooting the 'hey who deleted localhost from /etc/hosts' problem.