I also found it strange that PostgreSQL cannot simply support data formats of previous versions. In contrast, the latest version of ClickHouse[1] (23.1) can be

I also found it strange that PostgreSQL cannot simply support data formats of previous versions. In contrast, the latest version of ClickHouse[1] (23.1) can be installed over the version from 2016, and it does not require format conversions or any other migration procedures. [1] https://github.com/ClickHouse/ClickHouse/ https://github.com/ClickHouse/ClickHouse/