Funny you say this because I’m using one as I write this.
You using obsolete technology doesn't make it any less obsolete..
Because simply plugging in my headphones into the phone
Why do you keep trying to turn this discussion into a discussion of wireless vs wired? I'm not saying wires are obsolete, I'm saying the 3.5 mm standard is obsolete when it comes to modern smartphones because it's a standard from the literal 1950s (which is ultimately based on a standard from the 1800s)..
I don't have a 3.5 mm headphone jack, yet I can simply plug my wired headphones in using a wire too and just use it without bluetooth.. And I can use the same standard plug you too have in your phone already.. Why do we need an additional interface just for headphones when I can use the one that I already need to have in the first place?
It's still an unnecessary addition to modern smartphones that has an impact on design, etc..
And once again, you ignore what I wrote in my comment and try to turn this discussion into a discussion about "wires vs wireless/bluetooth" when it's obviously not..
If using an adapter is too much of a hassle for you, get a wired USB headphone.. It's funny, you pretend that the only viable options are either bluetooth or an obsolete standard. We already have a new standard.. We had it for decades now.. And it's already built into and used with virtually any modern smartphone. But no, because you are used to your old standard, you demand that the old standard is still used in addition to the new standard..
This isn't about what we could and couldn't do.. We could go back to using cassettes if we wanted to, there just isn't a good enough reason to do it as far as most people are concerned..
Look at your comment, you can't give me a good reason for your argument. Your only argument is "but it's not that much of a hassle" and "everyone used it in the past so we should continue using it"..
I can just use bluetooth, or I can just use USB. So can you.
But can you give me one argument why we should, in addition to having both bluetooth and USB interfaces on our smartphones, have an additional plug using a standard from the 1950s that we can ONLY use for audio when we already have to have a USB plug that can also be used for audio?