When I started as a developer 20 years ago, this was the most difficult thing for me. I would tend to over-think and include WAY too many "what if"-scenarios.

When I started as a developer 20 years ago, this was the most difficult thing for me. I would tend to over-think and include WAY too many "what if"-scenarios. So that is what I try to teach junior developers today: Only write what is required now and don't think too much about what the function might be expanded to do in the future.