So Pixel phones don’t support DP alt mode via USB-C, and Samsung phones don’t support Chromecast. Are they holding back these features for when they run out of ideas to sell new phones? I can’t think of any technical reason why we can’t have both.

Ubisoft might tell you that the game is already registered and won’t let you register it again, even with a new Ubi account. I would assume the scenario where the customer gets screwed is the default.