solana-loader-v3-interface is used at run time in 89 crates (of which 4 optionally). It is a direct run-time dependency in 9 crates. It's used only as a dev dependency in 13 crates.

Depender (with downloads and own rev deps) solana-loader-v3-interface version
353K 619 solana-program ^3.0.0
38K 22 solana-bpf-loader-program =3.0.0
36K 5 solana-loader-v4-program =3.0.0
2.7K 4 litesvm ^3.0
1.8K 3 solana-cli =3.0.0
1.7K 6 mollusk-svm ^3.0
120 litesvm-loader ^3.0
120 spherenet-program ^3.0.0
36K 61 solana-runtime dev =3.0.0