Amazon exec responsible for money-losers like Alexa and Fire Phone is departing

David Limp's departure from Amazon and the challenges faced by Amazon's devices and services division.

Key points:

1. David Limp, Amazon's senior vice president of devices and services, will be leaving the company before the end of the year.
2. Limp has overseen the development of major Amazon projects like Echo smart speakers, Alexa voice assistant, Fire tablets, and Fire TV devices.
3. Amazon's hardware strategy of selling products at cost has resulted in losses, particularly with the Echo smart speaker and Alexa voice assistant, which reportedly lost the company $10 billion.