So when we started work on the Nest Protect smoke and CO alarm, our second product, you’d think it would be easier. That everything we’d built already would let us skip a few steps. But the second you start a new product, you have to hit the restart button—even if you’re at a big company. Sometimes it’s even harder the second time around because all the infrastructure that’s been built up for the first product gets in the way. So you’ll still need to go through at least three generations before you get it right. You make the product. You fix the product. You build the business. You make the
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