This depends on the intensity of usage and the quality of the dartboard as well as the dart. If you throw a lot on a lower quality segment dartboard, your points will wear out sooner due to the metal spider often being too thick/wide or the sisal layer being too hard. In addition, you often have more problems with bouncers, which means that certain parts of your darts (for instance the shaft or point) have a bigger chance of being damaged or breaking). If you regularly replace the points and shafts on your darts, you can use your darts for a long time. Be advised that professional dart players replace these parts of their darts or even the entire dart quite regularly during a single match.