I have watched and analyzed every video out there of Jeff Bezos.

In my opinion, there are four types of businessmen — Sumo wrestlers, Tennis players, Chess players, and Poker players.

Bezos is a poker player — if he throws a card on the table (machine learning), it means he has better cards in hand and he does not mind sharing that secret with the world.

I am impressed that even today majority of people think Amazon spent 1500*4 = 6000 person years to develop Alexa so that people can ask it will it rain tomorrow!

Great companies cannot be built without great secrets.