I do think the headphone port should be put back in iPads. It’s a standard that isn’t going away in any foreseeable future, and its absence only causes headache for people in many scenarios. The pros of removing it might outweigh the cons for a tiny and waterproof device like a phone, but those arguments are lost for larger non-waterproof devices like iPads which are more often used for audio work which often cannot be done with wireless headphones. (Although with how big phones are now, the argument is weakening for phones too.) Apple even considered removing the headphone port from MacBooks, and may still be considering it. They sent me a survey years ago asking how often I use it, which surprised me. I use it all the time.