But it's advicable to repair your windscreen than to replace it because replacing the windscreen is bad for the environment.
The cost to dispose the windscreen is high and hard to dispose off.
Moreover it's not friendly to the environment.
Read this in an article.
What I heard is once you replace the windscreen, your may get more noise from inside the car. Probably the replacement won't be as good as the original or probably the workmanship. Maybe that's the wind noise...