Why are there people complaining that other devices have the headphone jack?
There has only been one other device released after the iPhone 7, the MacBook Pro, which was designed before the iPhone 7 headphone jack decision was made, and was intended to be released before the iPhone 7.
There are no new iPads yet but it's rumored they'll keep it as well as most other Macs due to the fact they have the space and will have that space for a long time. They said themselves that it is used for professional applications that Mac and iPad users may rely on and therefore they are keeping it by now.
While Lightning is better than the headphone jack, they do not believe it is the future so don't expect Lightning on Macs. They're only including Lightning EarPods because wireless is too expensive to include in the box, but wireless is what Apple are set on.
As for removing it, here are the reasons they did it:
- They see the future as wireless audio, and the iPhone is their most popular device and perfect to push everyone towards wireless audio.
- It allows for more flexibility in future iPhone designs.
These are not the reasons:
- It allowed for more space for features in the iPhone 7.
- It was done for waterproofing.
- To push lightning audio.
- To make people buy AirPods.
Having said that, it did make the first 2 easier.