Oh, ok, configuration is certainly an important component! Note that documentation if the development version of MPI.jl has also notes for HPC clusters sysadmins.
BTW, we have a Julia HPC working group meeting every fourth Tuesday of the month, and how to simplify configuration is a recurring topic. It’d be great if you could join us if you want to bring your experience or share your thoughts! See also JuliaHPC Meeting (we don’t use Google meet anymore, but the document with the agenda should have the link for joining the call)