It is much easier. There's "Apple Watch", "Apple Watch Series 1", Series 2, Series 3 .. So we end up with a classic fence-post error, where if I say I have th

It is much easier. There's "Apple Watch", "Apple Watch Series 1", Series 2, Series 3 .. So we end up with a classic fence-post error, where if I say I have the first model, most people could assume I mean Series 1. So we've taken to calling it Series 0 (a term Apple never used/uses). Otherwise if I just call it "Apple Watch", you have no idea if I'm implying a version number or not. I get their problem. "Series 1" is less "2nd generation" and more "revision 1.1". If they'd called it a 2nd generation, they'd overpromise and under-deliver, which is never popular. But calling the 2nd revision "Series 1" is all kinds of confusion.