You really learn to appreciate unit tests when writing algorithms based on heuristics. One heuristic can easily break another so unit tests become critical to a

You really learn to appreciate unit tests when writing algorithms based on heuristics. One heuristic can easily break another so unit tests become critical to avoid introducing regressions. However, BAD unit tests can definitely be a drag. But the remedy is not to stop writing unit tests, it is to write better tests! :)