Well sure, if you already have your own IPv4 address(es) - but not everyone has ! You forget about the opportunity cost that comes from our broken Internet whe

Well sure, if you already have your own IPv4 address(es) - but not everyone has ! You forget about the opportunity cost that comes from our broken Internet where you cannot assume end-to-end network connectivity because you might have to deal with NAT and especially CGNAT ! (How many protocols end up overcomplicated (=expensive) and dead in the water because of that ?)