Why is Google making so many messaging apps?

As if the communication and messaging apps ecosystem wasn't already bursting at its seams, Google has added three more--Spaces, Allo and Duo. Spaces can be downloaded on Android and iOS devices now, while Allo and Duo will be "available this summer". But wait, what's so different with Allo, in a world that has Whatsapp, Facebook's Messenger, Apple's iMessage and not to forget, Google's own Hangouts app? Allo is essentially designed to be a smarter instant messaging app and offer features which no rival does, yet. And most of those are based on the integration of machine learning, also known as artificial intelligence. What Allo does is it pre-empts what your response to a particular message might be, with some suggestions that show up as you are about to respond.