It's an exciting day for everyone involved when it's time to upgrade something that's been around for a while especially if it's been causing inconvenience for a while. This could be something small such as your old wallet that has clearly served its time or it could be big if someone accidentally hit the corner of your television, destroying the screen entirely.
Although it's unfortunate to spend that money that you weren't exactly anticipating to come so soon, the immediate relief that a new item brings is irreplaceable. Locks are among these items.
Locks can encounter issues anytime. It often doesn't matter how well you think you've taken care of them. You've tried your best to make sure that you didn't scratch up the outer layer of the metal and you made sure that you weren't using excessive force when you shut and open your doors. However, depending on how brittle your lock already is, all it could take is an unaccompanied child for it to break.
Hanging heavy items on the handle could break it and weather is always a problem. For people who live in dusty or humid areas, locks will tend to break faster and sometimes after rain, your door may swell up and cause you to be unable to lock your door as a whole.