It stops producing it. It stops supporting it. It diverts its resources to other pursuits in hopes of creating something bigger and better than before.
For example, a couple weeks ago, Apple said it was discontinuing the iPad 2. The iPad 2 was around since 2011 at a discounted price, and although it will be replaced by the better and faster iPad 4, we'll still miss the first iPad that had a front-facing camera.
Whether it's for purely nostalgic reasons or practical purposes, here are 12 discontinued products that we miss.