I don't mind the loss of 3.5 on one condition
You don't have to be older than a teenager in 2016 to remember the evolution of media from the eighties to the 2000s. CDs replaced cassettes because the tapes had to be rewound and didn't hold as much information. DVDs replaced VHS because of the same reasons. Now the DVD is being pushed out by Blu-ray. All of these advances were acceptable because the new format that takes its place is a suitable replacement.
That's why the iPhone 7 is such a disappointment. Instead of a dedicated audio port you now have to use your valuable charging port to connect a dongle or rip your wallet to shreds for wireless earphones. In this case - earphones you have to charge every 5 hours along with a carrying case you also have to charge. At the end of the day you literally have two more things you have to power up in addition to your phone. It's a sad state for handsets when it's considered a luxury to have to spend more money, time, and energy for what used to be a simple plug-and-play affair. Yes, other aspects of the phone have improved but none of them are groundbreaking or revolutionary enough to warrant this much of a compromise in a $650 flagship.
Some of the early Android phones also didn't have a 3.5mm jack. Users also went through the trouble of choosing between carrying an adapter cord or suffering with wireless audio quality. They learned the pains of not being able to charge and listen to something at the same time. Their recollection should be a warning to future buyers. If you still want an iPhone 7 that's totally fine but you can't walk around with a mess of adapters, plugs, and expensive earphones and say it's the best. Reliving mistakes of the past? Call it what you want but it's definitely not progress.