Last September, Apple spent much of its “Glow Time” event talking about how comprehensively they’d updated their AirPods earbuds line-up. There was a new base version, a new Pro — with various health monitoring features — and a mid-tier model with limited noise-canceling. That model doesn’t seem to sell well, which makes sense, given that if you’re willing to pay the price bump for the mid-tier model, you may as well pay a bit more for the Pro.