An architecture that scales well for a particular application is built around assumptions of which operations will be common and which will be rare — the load parameters. If those assumptions turn out to be wrong, the engineering effort for scaling is at best wasted, and at worst counterproductive. In an early-stage startup or an unproven product it’s usually more important to be able to iterate quickly on product features than it is to scale to some hypothetical future load.
End of chapter 1
