"If you want to use the full functionality of an Apple Watch without hassle, swapping back and forth between iPhones will drive you nuts. For instance, every time you unpair the Watch from the iPhone, you lose all your Apple Pay cards, and other configs. That would be a nightmare for me, to have to keep calling the banks and re-requesting the cards to be added."
But I think the issue is NOT about switching iPhones - it's about maintaining two watches on one iPhone. I read somewhere that when you unpair a watch, the settings are backed up on the phone. I'm hoping that would eliminate some of the problems like re-authorizing cards? I have an SS, and I'd like to add a Sports Watch to the mix for my work in a healthcare setting. I'm surprised at how little discussion there is about this. Any more feedback?