But it demands both. The ability to develop in a parallel, decentralized way, and the ability to integrate things at a central point, an authoritative source an

But it demands both. The ability to develop in a parallel, decentralized way, and the ability to integrate things at a central point, an authoritative source and a blessed official destination. It's similar to how databases allow to begin parallel, concurrent, even contradictory transactions, and also guarantee serialized, consistent database state, and rejection of invalid updates, at commit time. Both aspects are utterly important.