> But the (essential) behavior of the command remains the same. Of course. A command needs to do it's defined function. You'll find some programs that are qui

> But the (essential) behavior of the command remains the same. Of course. A command needs to do it's defined function. You'll find some programs that are quite a bit different when invoked from outside the terminal vs inside the terminal. Developers need to take into account both situations, which is really the point the original post.