Startups are a step function change. It will never ever, ever, ever feel linear, ever. It's always a step function change. You start off building a product, you're crafting in the lab, and then you put it out in the world, and then people swat it most of the time ... You feel like you're back to zero, because you are, in a way. But in some ways, you've already learned something, and now you can iterate to the next thing, so it's not linear.