The only motivation for the ISPs etc., who you need to get onboard, is to get more users. This is why IPv6 adoption has been soaring in the last 3-4 years when

The only motivation for the ISPs etc., who you need to get onboard, is to get more users. This is why IPv6 adoption has been soaring in the last 3-4 years when there's large new use cases that cannot economically get addresses in the volume they would require and didn't happen when IPv4 addresses were more freely available. The only other way to get them to invest in alternatives to IPv4 before IPv4 stopped meeting their business needs would have been via regulation.