MPSC is used at run time in 7 crates (of which 1 optionally).

Depender (with downloads and own rev deps) MPSC version
150 rsacracker ^0.2
110 1 handy-grpc ^0.2
1 task-exec-queue ^0.2
emulatorr ^0.2.0
simln-lib ^0.2.0
1 stdr ^0.2.0
150 rust-box optional ^0.2.4