&gt; but millions of machines were updated.<p>Millions more weren&#x27;t.  Shitty routers (did you know WEMO devices still run an old Linux 2.6 series kernel?  How about Cisco firewall appliances?  Yup).  Home automation systems.  Boxes people have half forgotten about.  Systems running software from vendors who won&#x27;t support you if you run anything more than half a decade old.