That may be part of the problem, but it also may be true that some minds simply work better under one paradigm than another. Since one must show proficiency in

That may be part of the problem, but it also may be true that some minds simply work better under one paradigm than another. Since one must show proficiency in imperative to get into the field, that's a filtering mechanism that guarantees most programmers can handle imperative already. If they change to functional, some may not handle it so well, taking much longer to learn. Observations of various organizations that tried it seem to confirm this. They have problems after the original team leaves.