I know this will probably get downvoted. It's impossible to predict how your app will fail ahead of time. So test driven development (for the most part) is

I know this will probably get downvoted. It's impossible to predict how your app will fail ahead of time. So test driven development (for the most part) is a waste of time. Every test you write will either continue to pass forever not providing useful information to you or will need to be updated when new features are added to the software, making them costly to have in place. Meanwhile they reveal very few defects that wouldn't easily be caught with a basic smoke test you need to do anyway. Of course, there are always exceptions. if you have software that is highly complex but the outputs are very simple and easy to measure then it might actually be a good idea.