Here's to all the cavemen still asking for the jack:
The jack is the only tech from the 1860s in modern day smartphones. What can the 3.5mm jack do that Bluetooth can’t do ? In fact, Bluetooth can do anything the jack does, and so much more. Let’s compare:
Can I walk away 50m with the phone while being connected to multiple speakers ? Vice versa, can I have multi phones and devices connected to a single speaker or pair of headphones ? Battery life of Bluetooth headphones average about 20-30 hours, which is good enough that you only need to charge them once a week for 2 hours.
On the other hands, wired headphones tangle, the cables fray and break. Not all plugs are gold plated, and get rusty, leading to poor sound quality over time. Plugging in the dark ? Yuck. Share music with a friend ? Dongle. And bike or ANY other sport with wired earphones ? Break a leg ! For home speakers, every connection requires a cable and 2 jacks, and that adds up for every speaker added, which is a hazard. Imagine if these speakers get rid of the jack and connect via wifi, you can move them anywhere you like, and tidying the room is so much easier.
Some would argue that smartphone can have Bluetooth and doesn’t have to remove the headphone jack. But considering that Bluetooth does everything the jack does, plus so much more, there is no point keeping the jack. It’s like having both a nokia 3310 and a 2018 smartphone, which one will be used more obviously ? Keeping the jack will only satisfy luddites who still currently own wired headphones, which will then break, and they will find that, no phones offer the jack anymore on the market. It is the inevitable future, because otherwise it would be ridiculous to ask for the jack 100 years from now. Might as well ride a horsecart while everyone else drives Tesla.
And many people accuse iPhone users blindly follow Apple and embrace Bluetooth. This can be hypocritical and applied the other way: manufacturers like Samsung have been keeping users back from enjoying the wireless future, enforcing ideas that the jack, a 1860 technology, is ok in 2018, and make a big deal out of it in their keynote. Bluetooth is updated every 1 or 2 years, with new features, higher bandwidth, better power efficiency. When is the last time an improvement came to the jack ? 1990 ?
This article has, so far, discussed the usecases of a consumer, and has yet to mention anything on professional audio and video producers. In a few words, the jack has no place in the pro-market either, because Usb-C is taking over with many more times the bandwidth and better frequency response. A professional who chooses to stick to the jack will only limit the quality and potential of his production.