As a I.T. teck, I often tell people to look at how long an item stays on their desk. The longer it is there the more money you can safely drop into any item. Since the 3.5mm headphone jack is the universal standard for speakers, don’t be to shy to drop good money on to a decent set of speakers and to avoid anything that does not use the 3.5mm plug. Kinda like when I was dumb enuf to get the iSub that used a USB port when I got my G4 iMac. Great sub-woofer but when I got my next iMac (an Intel based iMac) it then refused to work so it became a worthless paperweight. This whole debacle is mostly why the iSub is now dead and no longer available form Apple. The $300 speakers I got to replace that bad decision back in 2006, is still the speakers I am still using today, ten years and three iMacs later.
This will also force the many people that use the 3.5mm connection, that was built in to their cars, to stop using their iPhones for music. As for the idea of using Lighting connectors for headphones, how long until Apple decides to change the connector like they did with the 30 pin connector. This also made my desktop docking station and current shelve stereo connector worthless and that change is why you don’t see non-Apple stereos offering connectors like you did prior to 2011 and the few car makers that offered the 30 pin connector gave up and placed a 3.5mm port in their cars instead.
In the past Apple has done some stupid things, like discontinuing the Newton or the lack of USB ports on the MacBook. I see the removal of the 3.5mm headphone jack to be the next big disaster for Apple. Watch closely as the sales of the iPhone7 drops off sharply after a few months when reviews start to show up, as people switch to another smart phone to keep using the overpriced headphones they got several iPhone models ago or to use an iPhone in their cars. Then in a mad scramble, Apple will bring it back to rescue the line with the iPhone7S or 8, but never fully recover from this super blunder.
If Apple does this I will make the switch to a Galaxy phone to avoid being forced to use $75 and up headphones, which will only work in the iPhone7. Even though I am using a $50 Non-Apple set now that blows away the current crappy ones that apple is currently supplying its costumers at $30. Even at $10 I can get better models than the ones Apple supplies, just minus the on-wire-remote. However I can also use my current Non-Apple headphones on my current iMac, MacBookPro, iPad, (or any other device for that matter) and while still using my iPhone for music in my car.