It's clear that the scale and complexity of Facebook's operations are staggering, with billions of users and a vast array of technologies working in unison.

One notable aspect is how Facebook has evolved its technology stack over the years, from its early use of LAMP to the development of custom solutions like HipHop and HHVM for better performance.

The mention of using open-source technologies like Hadoop and Hive for data analysis underscores the importance of community-driven innovation in the tech industry.

Incredible article with so much to think about. Thank you Daria.