The current development team didn't always build it, either. And the pressures and incentives are often biased away from improving things, no matter how much in

The current development team didn't always build it, either. And the pressures and incentives are often biased away from improving things, no matter how much individual developers might want to. "You build it, you fix it" has to apply to the powers that be (i.e. the product managers and such), not just the individual contributors.