[n4r9]

There is an issue on their GitHub relating to customisable contraction hierarchies, but it doesn't seem to have gotten much interest.

https://github.com/Project-OSRM/osrm-backend/issues/6574

[DennisL123]

Yes, the idea was to transition to a variant of MLD that lends itself to the offline use case and would use an updated modeling to be more space efficient while preserving performance. There exists an incomplete (and private) PoC written in Rust.