While kittenhouse is, unfortunately, abandonware (even though you can still use it and it works), you can't say the same about e.g. async inserts in ClickHouse:

While kittenhouse is, unfortunately, abandonware (even though you can still use it and it works), you can't say the same about e.g. async inserts in ClickHouse: it's a very simple and robust solution to tackle exactly the problem the PHP (and some other languages') backends often face when trying to use ClickHouse