parity-bip39 is used at run time in 510 crates (of which 9 optionally). It is a direct run-time dependency in 2 crates. It's used only as a dev dependency in 5 crates.

Depender (with downloads and own rev deps) parity-bip39 version
280K 479 sp-core ^2.0.1
13K 20 sc-cli ^2.0.1