KDBush is used at run time in 2 crates (of which 1 optionally). It's used only as a dev dependency in 3 crates.

Depender (with downloads and own rev deps) KDBush version
startin ^0.2.0
h3ron-polars optional ^0.2
5.3K 18 geozero dev ^0.2
flat_spatial dev ^0.2.0
geozero-core dev ^0.2