Unless you need to keep the old headphones for your computer at work. Or want good headphones for in-flight entertainment on planes, or if you have an iPad that you don't replace as frequently as your phone or computer.
In the meantime, you suddenly need to pack multiple sets of earphones and/or dongles when you travel. Oh, and don't forget an extra AC plug for your Airbud charger so you can charge it at the same time as your phone.
I know it can be frustrating but that's how tech works. I used to have a lot of old serial devices, a lot of external SCSI devices, yadda, yadda, yadda. Tech moves on. You upgrade.
Hey, if you want to listen to your wired headphones on a plane, bring them and if you want to use them on your iPhone use the adaptor that literally is nothing more than a wire a few inches long. Don't make it sound like you have to bring a toolbox full of stuff. Are you posting on airline forums about having to bring that stupid two prong adaptor so you can use your own headphones on a plane?
And you don't have to bring an "extra" AC plug. Use the same one you charge your phone with. Do you really need to charge all of your devices at once?
I travel. I travel a lot. Like Asia and Europe and the Middle East kind of travel. Believe me, between all of the plug converters and everything else, brining a six inch piece of wire is not going to dramatically change my packing list.
When I travel I typically bring 1 or 2 AC plugs (two if I'm traveling with my wife), a USB-USB mini adaptor (for my mini-USB devices like DSLR chargers, GoPros, etc), two or three USB to lightening cables, my laptop, my phone, a power brick, sometimes an iPad or iPad mini (for reading books or watching my own movies), and my laptop charger cable. If I bring headphones (I don't always bring them) I also throw that stupid two prong adaptor thingy.
Oh, and more recently, my Apple Watch and the Apple Watch charger. But even then, if I know I'm going to be in transit for extended periods, I won't bring the Apple Watch at all and will bring the trusty old Casio G-Shock.
I've never had a problem keeping all my stuff charged up. Sometimes my transit time will be over 30 hours.
I never use my iPhone on planes. That is a critical communications tool that I will need as soon as I hit the ground. As soon as I board the plane, I switch the phone off to save the battery. Once I'm settled somewhere where I know I have easy access to charging, I'll use it for music and books and games and such but not when I could find myself stranded in the Hong Kong airport with no juice in my phone.
That's why I bring an iPad. I can listen to podcasts, watch movies, play games, or whatever. And if I drain the battery I charge it using my power brick or the onboard power (if the plane has it). And if I've drained the battery, chances are I should probably be giving it a rest and catching a snooze anyway.
Same if I need to get work done that can't be done on the iPad, I use the laptop.
For travel, I do not bring wireless headphones regardless of what phone I'm bringing simply because they don't interface with the onboard entertainment systems on planes. Maybe that will change with the iPhone7 (due to me getting used to Airbuds) and I'll have to bring the Airbuds case as my "on the ground" headphones. But that's on me. That's a choice. I'm not forced to. They're totally optional if I bring my wired headphones.
When I arrive, between the two USB ports on my laptop and the AC plugs I've brought with me I can charge everything that I've brought with me.
Every night when I get back to the hotel, everything gets hooked up to chargers so it's ready to go for the next day.
I don't know why people make this out like it's a huge burden. It's not. Especially if you're already used to traveling efficiently.