rstack is used at run time in 4 crates (of which 1 optionally). It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) rstack version
27K rstack-self ^0.3.0
130 rust-spy ^0.3.3
rsps ^0.3.2
lxtrace ^0.3.1
4.6K 2 apollo-router dev ^0.3.3
uhg-custom-appollo-roouter dev ^0.3.3