With wisdom you come to the conclusions you have. The value is somewhere in between. You shouldn't mindlessly reimplement working tools, but you shouldn't keep

With wisdom you come to the conclusions you have. The value is somewhere in between. You shouldn't mindlessly reimplement working tools, but you shouldn't keep patching old tools either. Somewhere in between, you project the current and future requirements. Sometimes you have the old tool on life support, sometimes you restructure parts of it, sometimes you reimplement it from scratch. You will often make a wrong decision and that is okay - you just learn that minimal work is often the best way forward unless you positively know otherwise.