[kelnage]

> There is no way Amazon has echo / alexa out there just so it can develop a language recognition model. They could just record their customer service reps talking to customers, train it on the millions of movies and shows with subtitles on amazon prime or train using audio book narrations

Training their recognition model on a range of pre-recorded, staged audio sources would likely result in it being very good at generating subtitles - but not much else. As for the telephone, again, it's relatively different (the customer reps will likely be using a script in some cases, and are going to be putting a lot of effort into being comprehensible). And neither would effectively simulate the situations (for example, a noisy family home) an Alexa will likely be used in.