> while a billion smartphones were added
A huge number of them being on IPv6-only mobile networks using NAT64 to access the old Internet.
That was a really bad miscommunication - especially as we are running out of IPv4 in Europe this month. - see https://ungleich.ch/u/blog/when-does-ripe-run-out-of-ipv4-ad...
IPv4 was supposed to run out and the Internet come crashing down 5 years ago, yet here we are, and everything seems just fine, while a billion smartphones were added.