Folks were writing CFD codes in Matlab too, that does not mean that it was a good idea (except for 1D or small 2D problems or for prototyping). My point was tha

Folks were writing CFD codes in Matlab too, that does not mean that it was a good idea (except for 1D or small 2D problems or for prototyping). My point was that some languages are better suited for particular tasks. In CFD and FEM codes you want speed, if you need to wait a few days for a highly optimized C++ code to get some results (e.g. the flow around an entire airplane) imagine how long it will take to do the same in Go or Common Lisp ... Case in point FEMLISP uses C or Fortran libraries (Triangle, Tetgen, OpenMP, various linear algebra libraries) under the hood for the actual computation :).