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

Depender (with downloads and own rev deps) MemStore version
wolfengine ^0.2.0
230 4 async-raft dev ^0.2.0
1 async-raft-ext dev ^0.2.0
async-raft2 dev ^0.2.0