Honestly I do not see any performance issue for a reason: shell scripts are not HPC, high load network services etc, they should/must be just small-ish stuff fo

Honestly I do not see any performance issue for a reason: shell scripts are not HPC, high load network services etc, they should/must be just small-ish stuff for doing small kind of automation. They exists for that very reason in unix. Surely ancient systems, with a single language and end-user programming concept can be far more efficient and productive, but that's another story...