It requires extra hardware to get the same functionality I’d have by having a traditional jack.

Also the excuses these companies make up for removing it are always silly. No, the phone isn’t too thin to have one* – that’s always marketing BS. It’s always, always, always to save the pennies it costs to add a headphone jack. Those pennies of course add up during manufacturing.

They can save costs in that way because some people don’t care. It makes a simple headphone jack seem like a nothing feature, and the narrative can be pushed that those who want it are simply latching on to the past. Something similar happens with the arguments for and against physical buttons vs. touch screens, especially in cars.

*there is a YouTube video (I believe by Strange Parts) where they add a headphone jack to an iPhone which Apple had explicitly claimed was too thin to have one.

I have multiple dozens of headphones that have a normal headphone plug.

I can charge my phone while I listen to headphones without carrying multiple adapters.

We can maybe talk once we get more than 1 USB c connector on a phone. Maybe.

I need a special adapter to charge my phone simultaneously

Also, I can’t connect it without an adapter to my car, my headphones or my home cinema stereo

There are way more aux jack headphones out there, and you don’t want your very high quality headphones suddenly be forced to be considered obsolete just because tech companies feel like selling a different product.

1. USB headphones require new drivers constantly.
2. USB headphones are likely to use proprietary apps for basic features like noise cancellation.
3. Audio jacks use significantly less power/processing compared to USB.
4. Audio jacks do not hog usb bus lanes, which may or may not be an issue for mobile, but on PC it is.
5. USB headphones are in general significantly lower quality, because studio equipment uses 3.5mm or other standard jacks (XLR for microphones for example) as they cause the lowest interference.
6. USB introduces overhead latency which is a no-go for production use.

Let’s invert the question: what makes it worth the switch? If I’m going to change something, you have to prove why it’s worth, not me proving why I shouldn’t.

Because it sucks and the 3.5mm jack is better. Manufacturers should be forced to include it or pay a punitive fee calculated to far outweigh the savings of not including the jack, perhaps $5,000 per individual unit manufactured.

Because it needs an extra dongle that isn’t free and most headphones use an ordinary audio jack.

Charging while listening.

And above all, if it ain’t broke don’t fix it.

Downsides of usb-c headphones:

1. Bluetooth security risk surface, exposes your phone to more attacks. (Nobody has mentioned this yet)

2. Most/all phones have a single usb-c port. Charging and using headphones difficult

3. Usb-c port placement is awkwardly on bottom of phone while must headphone jacks are on top of the phone. Plugging in your headphones on the bottom of the phone with a dongle is awkward.

4. The entire process of using a usb-c dongle or using Bluetooth headphones makes the entire system more complicated. KISS (keep it simple). The more complexity there is that can go wrong, the worse the experience. If I’m taking a important conference call, I want my audio to just work.

Not directly related: the whole point of removing the headphone jack was to sell airpods. First apple, then android, and even fair phone. Each time the jack is removed to push sales of the branded Bluetooth ear buds. It’s a user hostile move.

https://www.wired.co.uk/article/apple-airpods-success

The excuse may be to save money, Space, water rating, but the reason is increased sales.

I personally still use a pixel 5A which had a headphone jack only because it’s the B tier phone for markets where people are less likely to also buy the airpods.