ClickHouse is incredible. It has also replaced a large, expensive and slow Elasticsearch cluster at Contentsquare. We are actually starting an internal team to improve it and upstream patches, email me if interested!
There is also a video recording of the 2019 presentation available here.
https://www.youtube.com/watch?v=lwYSYMwpJOU
nb: The video is not great because the camera is often losing focus but it's still understandable.
I'm not sure there is a public writeup. I know that the incredibly talented guy who created the first CH setup at CS planned to write a more global post about data analytics at scale, but after 2 years I still wait for it