I think I'm in the minority, but I haven't really missed the headphone jack in my iPhone 11. I have the Echo earbuds, and those have been good to great for my use cases.
This continues to feel a bit like the 3.5 floppy and CD-ROM removals from the Mac: a lot of people hated it, until it was a nonissue.
You don't miss it until you do. When you are trying to join a meeting and your bluetooth headset absolutely refuses to work (and yes, even the fancy Airpods Pro do that occasionally), you wish you had the ability to just plug in an old-fashioned, analog headset. Which you can pull easily, with no fuss, from many devices, including computers and gaming consoles. Quick, no pairing required. No battery issues.
Analog headphones are also very cheap(good if you are not in a rich country), and will always be cheaper than bluetooth headphones, as there is minimal hardware required. You can quickly pick one up even from a shady street seller and you know it will work(longevity might suffer, but again, cheap).
The only problem with the headphone jack is that it is a very old standard. It's big connector, and takes significant real state inside a phone.
While I got the Airpods Pro when they launched and loved them at first, the battery degradation and seemingly worse ANC performance has really irked me given their price. I've also tried using cheaper wireless earbuds, but their connectivity can be spotty. I know it's not the worst issue, but I do miss being able to take a pair of wired earbuds and use them freely between my laptop and phone and not have to worry about their battery lives.
It was basically a forced upgrade to bluetooth headphones. I bought some bluetooth over-ear ANC headphones like two weeks later and it really hasn't annoyed me at all since.
The larger problem with modern phones is the form factor.
These days, I charge my wireless headphones once a week. When I turn them on, they are connected before I have opened the music app. The connection is stable. When I stop playing sound on my phone and start sound on my laptop, they automatically switch to that. Their microphone is perfectly fine for calling people.
It’s gone, it’s never coming back. To that end, once iPhone goes USB-C it’ll accelerate this majority non-issue.
The phone MUST create analog audio signals, to drive its own speaker. Denying customers a connector to access it is petty and offensive. Compounding that offense is requiring every listening device to now incorporate redundant D/A converters. Contrary to apologists saying that this enables better quality, it in fact results in wholly unpredictable quality.
Not to mention that your ears will ALWAYS require analog audio. So do billions of amplification devices around the world.
There's no excuse.