Better distributed computing libraries and semantics (MPI, OpenSHMEM, ...). At the language level, it is not completely clear how RMDA and lifetimes/references

Better distributed computing libraries and semantics (MPI, OpenSHMEM, ...). At the language level, it is not completely clear how RMDA and lifetimes/references should interact. Better GPGPU support, for CUDA and OpenCL, ideally with direct compilation of Rust code to GPU assembly.