It is not only about the content but the energy and how to present it.

They rock presenting great content in a great way.

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Monica Dinculescu (https://github.com/notwaldorf)

PWA starter kit: build fast, scalable, modern apps with Web Components (Google I/O '18)

https://www.youtube.com/watch?v=we3lLo-UFtk

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Kelsey Hightower (https://github.com/kelseyhightower/)

Keynote: Kubernetes and the Path to Serverless - Kelsey Hightower, Staff Developer Advocate, Google

https://www.youtube.com/watch?v=oNa3xK2GFKY