When I reviewed the OnePlus Watch 2 last month, I said it had a digital crown. I did so because it had a b***on with grooves that you could twist and press. I didn’t think much of it, but a few readers contested its crown-ness. This, they said, was naught but a mere b***on.To that, I furrowed my brow. The problem was that twisting the OnePlus Watch 2’s “digital crown” didn’t do anything. It broke the unspoken nerd covenant that smartwatch crowns must scroll. Pressing the b***on brings up an app menu, but twisting it? Zip, zilch, nada. On other smartwatches, twisting a crown generally lets you scroll through menus and notifications — whatever’s on your display. Since this b***on didn’t do that, the people argued, it could not be a…