The claws grow longer and longer, eventually becoming long enough to get snagged on furniture — or on you. Ouch.
For some cats, things get much worse. I’ve seen cats with claws embedded in their paw pads. It happens more often than you’d think. The most common scenario is an old cat living with an old person. The owner loves her cat but due to poor eyesight, doesn’t see the disaster that has befallen her cat.