Vitalik Buterin said that apps are 80% special purpose, meaning their design and purpose are heavily shaped by the developers' social philosophy

Quotes that support claims

“Apps are 80% special purpose. What apps you build depends heavily on what ideas you have of what Ethereum apps, and Ethereum as a whole, are there to do for the world. And so having good ideas on this topic out there becomes crucially important,” Buterin said.

Apps are ~80% special purpose. What apps you build depends heavily on what ideas you have of what ethereum apps (and ethereum as a whole) are there to do for the world. And so having good ideas on this topic out there becomes crucially important.