[ktRolster]

It is a convenient extra piece of flexibility. When you want to extend code in the future, inheritance can make it easier.

[codr4life]

Sorry, not buying that one. There's nothing in inheritance that makes extending code easier. You either design for extension or not, has nothing to do with OOP.

[ktRolster]

Inheritance creates an extra extension point automatically. You don't need to design for it.

A good, thoughtful design is better, of course.