> ClickHouse, for example, claims insert throughput performance of 50-200 MB/s and up to 1M+ rows per second in common use cases

This is what I've written in my docs in 2016 :)

Today you can easily get 50 million inserted records per second on a single machine, as demonstrated here: https://www.youtube.com/watch?v=JlcI2Vfz_uk