This misunderstanding comes up often, but the code and the blockchain are different domains.

You need consensus on the blockchain, but you need a benevolent dictator, coupled with good communication, to make great opensource software.

While the Blockchain is democratic in nature, a dev team is oligarchic - an open technocracy. You want the best idea to win, not the most popular one.

Maybe in 100 years we will make great software by group vote, its a much harder problem to solve.