What happened on the Internet during the Facebook outage

This post details the impact of the Facebook outage on Cloudflare's 1.1.1.1 DNS resolver, observing a 60x spike in SERVFAIL responses for Facebook/WhatsApp queries and an overall increase in A/AAAA query rates. It highlights the resilience of 1.1.1.1, which maintained its performance metrics. The post also analyzes traffic shifts to other platforms (social media, messaging, gaming, news) and presents data from Network Error Logging (NEL) and WARP traffic to Facebook's ASN, showing a significant drop during the outage. Additionally, it notes a decrease in traffic from Facebook's crawlers and user agents to Cloudflare's CDN.