The law implies testable consequences, such as what the economic incentives should be from interconnecting networks. They are good enough that we should expect

The law implies testable consequences, such as what the economic incentives should be from interconnecting networks. They are good enough that we should expect to see more drive to interconnect, and stronger barriers to entry for future networks, than history actually shows. https://www-users.cse.umn.edu/~odlyzko/doc/metcalfe.pdf https://www-users.cse.umn.edu/~odlyzko/doc/metcalfe.pdf offers this and several other lines of evidence that the law is wrong, and O(n log(n)) is a more accurate scaling law.