This article notes 2025 saw a 3% increase of 15m. That means total sales are 0.5b, or 2.5% of Apple's airpods product.
In other words: tiny market with a growth in line with inflation after years of decline? Let's call that 'exploding sales' and farm some clicks.
Yes perhaps there is some newfound interest, but since bluetooth headsets took off they keep getting cheaper to buy, easier to pair and connect, longer lasting batteries, easier to find, smaller to pocket, more varied, more comfortable to wear, and with better noise-cancelling. Plus every year fewer devices carry the headphone jack.
It's on the way out, though it'll be a slow death. I have a pair of wired headphones, I prefer them on corporate laptops for meetings because corporate laptops suck with pairing. But that's about it.