How do you think pervative NATs were enabled in the first place? First came dial-up modems. Can't have a server with those without monopolising the phone. The

How do you think pervative NATs were enabled in the first place? First came dial-up modems. Can't have a server with those without monopolising the phone. Then came the DSL. Providers noticed that nobody has a server, and deduced in their immense commercial wisdom that they didn't want a server. So they made the DSL Asymmetric. Now people could have a server, but the upload was so terrible it wasn't worth it. Conclusion: the ISPs were right: nobody wants a server. There was this P2P fluke, but the copyright lobby kindly explained this was only used for illegal stuff. Everything's mostly back in order now. Anyway, now we've established nobody needs nor wants a server, we can put NATs everywhere and nobody will notice. --- DSL was the first avoidable mishap in a long string of centralisation trends.