That's what IPv6 is. People get so fixated on being annoyed at IPv6 they forget to actually think. Whatever you invent won't be any better than IPv6. Many people have tried.
If you change the address format even the tiniest amount, if you add one single additional bit, your new protocol is already completely incompatible with all existing IPv4 software and equipment.
If you change the address format even the tiniest amount, if you add one single additional bit, your new protocol is already completely incompatible with all existing IPv4 software and equipment.