Also, in the WeChat model, everyone is tied to WeChat and can't go around it.
This voice based model can be integrated into any existing system. It already has the network effect going for it and it's not tied to the fate of any one company
No, you just become tied to Google. You can't reimplement Duplex yourself without reimplementing both their API and their voice recognition verbatim, and the best way to do that is to simply use their product.
Not necessarily. Given the rate of progress in AI and the number of companies working on it, it's only a matter of time until Duplex-like tech is reimplemented by other large corps like Amazon and Microsoft, and eventually it'll could even be implemented by startups if there is a decent business case for it
This voice based model can be integrated into any existing system. It already has the network effect going for it and it's not tied to the fate of any one company