I likely lost touch with some friends over the years because of general confusion over Google Talk, GTalk through GMail, Google+ Hangouts, later Hangouts, GChat (which I understand to be separate from the current Google Chat?), and Google Chat. The ones I've kept in contact with all agreed to move back to SMS and email.

Meanwhile ten years after Apple supported adding boarding passes to their wallet, I finally managed to force a plane ticket into my Google wallet by taking a picture of the barcode, so there's that.