Back in January 2017, Google and Uber teamed up to put a cool feature in Google Maps: You could search for, book, and pay for an Uber all directly from Google Maps. You didn't even need the Uber app installed. Now, 18 months later, the feature is dead. Google posted a new support page (first spotted by Android Police) that flatly states, "You can no longer book Uber rides directly in Google Maps."My guess? Other ride sharing apps were looking for a similar space, and Uber attempted to steal autonomous driving tech from Google, and Uber has simply become toxic on many levels.
The feature would have you search for a location in Google Maps and ask for directions like normal, but instead of choosing walking, driving, biking, or mass transit directions, a tab for ride-sharing would allow you to book a ride directly. The ride-sharing tab still exists, but instead of booking an Uber, it just gives you an estimate and offers to kick you out to the Uber app.
Of the three, my guess is that the latter was the deciding factor.