AI scrapes internet from millions of IPs worldwide proving an orchestrated, intelligent, botnet effectually becoming a large percentage of total internet traffic overnight.
Internet responds by retreating to behind a single cloud provider who can mysteriously keep ai at bay... Same provider network is probably responsible for the near instantaneous distribution of AI traffic to begin with.
Internet's last bastion of hope is attacked, rather quickly, and half of the internet is scrambling to remember how to administer DNS (The other half never knew).