NOBODY will like this idea, but if you really want to keep using IPv4, then: If the goal is to stick with ipv4 because it is easier then I think you would get

NOBODY will like this idea, but if you really want to keep using IPv4, then: If the goal is to stick with ipv4 because it is easier then I think you would get more traction if you could convince governments to work with ARIN / RIPE / AFRINIC / etc... to do eminent domain forced consolidation and buy-back of horded IP space. Give companies, organizations, government DISA, DoD, Military and others a year to consolidate their actual usage into smaller CIDR blocks, then governments buy back the unused space at market value. I am not a fan of eminent domain but this would be a valid use of it and could actually happen, accepting there would be a myriad of law suits, stalling tactics and so on. Provide some incentive for people to willingly consolidate in a timely manor such as paying a higher market value for those that get on board early. As crazy and possibly unethical as that suggestion may be, I think it would at least get some momentum and you could possibly gain more than 419M IP's and have less network fragmentation. As a bonus, no need to update router firmware, IoT firmware, operating systems, application configurations, firewall OS, firewall rules and so on.