> IPv6 is inevitable, you can either deal with it now while it's hard

20+ years on, and IPv6 is still hard. This is unlike other things that were hard 20 years ago; TLS was hard 20 years ago, and now it's not so bad. 20 years ago, databases were hard, now they're not so bad. Etc. But IPv6 is still hard, so it shouldn't be surprising that people are still waiting.

OTOH, IPv6 is widely deployed in (many) mobile networks, so using it can eliminate the NAT layer(s) that are almost certainly present for IPv4 on mobile.