When you factor out the common parts, you get a compounding advantage for building similar things in the future.

This is the fundamental emergent power of platforms.

If someone else already solved the same problem before, you can stand on their shoulders and reach even further than they did.

The leverage of a platform is how likely it is that you don't have to build a thing if someone else built a similar thing in the past.

The leverage of a platform is its combinatorics; are the building blocks right-sized and easy to discover and adopt.