The problem with the log-window in the simulator, is that if your program segfaults everything crashes, including the log-window. This makes it less-useful for debugging purposes.
It would be super handy if the logging functions also dumped their messages to stdout, stderr so they can be viewed in the console, and automatically processed with grep, etc.
(Or maybe the log window can be a separate process? But just using stdout seems like an easy, quick win).