Amazon, Google, etc. etc. all these companies building their own custom network devices, and so much of it coming back to both &quot;It does too much, most of which we don&#x27;t need&quot; and &quot;We want to do our own thing at that layer&quot;.<p>As James Hamilton noted at the AWS Re:Invent convention, not only is there they overhead and development expense of these unneeded components, just the sheer complexity of the application running is inevitably leading to bugs and unexpected behaviour.  By simplifying the device to just do the few things you actually need it to do, you end up more performant, and more reliable.<p>I wonder if the entrenched network appliance providers will wake up?