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This particular sensor isn't used in mass produced devices AFAIK. NTC thermistors are cheaper and easier to design for using cheap analog components. Reading DS18B20 is quite an exercise when it comes to $0.05 microcontrollers used in e.g. household appliances.

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That's true in an analog design, I recently took apart a generic computer power supply that failed and noticed it used NTC thermistors. In a hobbyist kit I purchased that came with with various cheap sensors, the temperature one has a Dallas 18B20 on a board to be interfaced with an Arduino. It's probable that some people would just duplicate exactly what they used on a quick-and-dirty design to be deployed on a small scale.

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