Speaking from many painful experiences, DRY is underrated. Duplicate code is a major liability, and due to the natural entropy of code, duplicate sections will

Speaking from many painful experiences, DRY is underrated. Duplicate code is a major liability, and due to the natural entropy of code, duplicate sections will slowly drift apart over time. Yes, sometimes you may discover that you prematurely DRY'ed the code, and it was just accidentally similar. Easy, you just un-DRY the code. This is a trivial operation. In an IDE it might be a single keyboard shortcut. Going the other way is a difficult and error prone process.