I think the main issue you face here is that there is already a big C/C++/Fortran ecosystem around distributed computation, one that happens to be very well imp

I think the main issue you face here is that there is already a big C/C++/Fortran ecosystem around distributed computation, one that happens to be very well impedance-matched to numerical linear algebra, and one with which experts in numerical linear algebra are intimately familiar (MPI). Why bother with Erlang as a thin wrapper over C++ when C++ has the necessary facilities already?