Strong type systems (as opposed to weak) come at very little cost, though. There really isn't any reason not to use a language with a strong type system. It wil

Strong type systems (as opposed to weak) come at very little cost, though. There really isn't any reason not to use a language with a strong type system. It will catch a massive multitude of otherwise uncaught bugs and slash unexpected behavior. It doesn't magically replace all tests, but it means you need fewer of them to achieve the same level of quality. Static typing has a similar effect, but it's weaker (number of bugs caught is lower) and it comes at the expense of verbosity. Your code cannot be as short and sweet anymore, and that makes it more unreadable. I'll take a strong test suite over a strong type system any day too, but given the choice, there's no way I'll ever do anything more than tiny scripts in a weakly typed language again.