They didn't put Soli in the Pixel 4 for the users. They did it to gather sensor data for their ML dataset, for future applications. The user-facing features ar

They didn't put Soli in the Pixel 4 for the users. They did it to gather sensor data for their ML dataset, for future applications. The user-facing features are just there to encourage slightly more usage and justify including it. disclaimer: This is pure speculation.