Just wondering why you would want to use an old fashioned tethered headset when you can go cable free. I just bought myself a Sena 30K and so far it seems fantastic. It has voice activation and even has a great built in FM radio. You get in helmet GPS directs and of course voice activated speed dialing for your phone. No cables to get tangled in and no modifications to be made to your bike.
I still use corded headsets for a few reasons, nothing to do with old fashioned, but everything to performance and convenience.
1. No batteries to run down before the riding ends. Very few BT headsets will last 10 hours in real world use when new. After five years of use, the battery life will be significantly less. By 10 years of age, the battery life will likely be completely impractical for a real traveler. My BMW (J&M) headsets still work 24 hours a day at 11 years of age. My prior Kawasaki headsets (Clarion, if memory serves) worked 24 hours a day at 17 years of age.
2. No batteries to recharge every night and extra chargers to carry. I already have to carry a 4 port charger for two iPhones and two iPads.
3. Much less bulk on the helmet.
4. No fiddling required while riding.
5. Much lower initial cost and much greater useful life.
If the above attributes are old fashioned, then I'm happy to be old fashioned. Newer isn't always better.
Sure, wireless has its advantages such as no cords to deal with and the ability to talk bike to bike if close together. However, I can easily get off my bike without unplugging my headset cable and remove my helmet. I rarely unplug it other that in the morning and at the end of the days ride. And the cable is unobtrusive while riding.
For me, corded advantages still far outweigh wireless advantages. Unfortunately, most new bikes only offer BT, which is a pain and will likely force me to the inferior BT technology when I replace my LT.