Not reinventing but reimplementing it for Postgres, which didn't have serious OLAP capabilities before. Lots of "newsql" systems are combining OLTP and OLAP by starting at one side and adding the other.
So far Timescale has column-oriented compressed storage and scale-out partitioning, and they're working on matching the compute part.
[1]: https://www.timescale.com/blog/what-is-clickhouse-how-does-i... [2]: https://www.pradeepchhetri.xyz/clickhousevstimescaledb/ [3]: https://tech.marksblogg.com/benchmarks.html
NoSQL databases with their half assed SQL grammar implementations are a real pain to use in real applications where they often have to be handled differently in code vs the RDBMS because either their syntax is slightly different or their connection stack is incompatible.