Holding onto my 6s as long as I can, because of the headphone jack. My headphones are kind of expensive. I also plug them into my laptop. If I'm putting an adapter on and off all the time I'll keep losing adapters, but I'd rather not buy a second pair of nice headphones.
A silicone tether like the ones you can get for the cap on the Apple Pencil. Yeah another item you shouldn’t need. But it would keep the adapter tethered to the cable so you won’t lose it as you swap between phone and laptop.