I'd say this:
I'd still like a headphone jack.
Still like SD support.
And would love removable batteries.
I don't think there's a right answer here that Apple got right or wrong. All of this shit, in the end as a product is more or less irrelevant. People aren't really dying over this, any convenience or inconvenience over these is marginal, and in Apple's case more than the Android manufacturers which face way worse competition and smaller profit margins, isn't courageous.
IPhone users were going to buy what Apple put out, they could still have the 3.5mm jack and people would still buy it. Nobody's never bought a phone because it had a headphone jack. Nobody bought a phone because it didn't have SD card support. Nobody bought a phone because you couldn't replace the battery.
I grew up when we had nothing but portable calculators, voice recorders, cameras and radios. Granted there were all kinds of portable things but I'm just talking about what you could fit in your pocket not monstrous double deck tape players or turntables that ran on 10 pounds of D batteries that you can hardly find anymore. It was amazing that for a brief moment all the portable things of the era converged and we literally got a portable everything with the first modern smartphones, radio, music, a calculator app, dictionaries, rechargeable and replaceable batteries, cameras, you name it. It was great.
It will always be great. And every feature stripped away will forever be a loss. Obviously the loss of FM radio(with the headphone jack) wouldn't be the death knell of a phone, it's not technically what a phone is, just like you could ban the calculator app for most people, you could ban a voice recorder app for most people, you could probably strip away most features sans social media apps, texting apps, the web browser, GPS, the camera and the phone, slap it in an iPhone case and sell it. That's beside the point. The point is each time it is a lesser product because of it.
And technology moves fast enough that you can pick most things to drop and at some point you will be "right," you could say drop support for all Wifi signals but the latest, one day that will be correct, drop support for all but the latest bluetooth, one day that will be correct, all this shit changes.
In my opinion what Samsung shows, at the bare minimum because I don't know why they are dropping the 3.5mm jack, is that Apple could have held it on longer and pleased more of their customers without it being an engineering issue that prohibited anything and that they didn't, purely for money. That's not brave or good. LG has shown you can still keep the jack, it's a fucking shame they can't do updates competently or even launch a phone right in this country or I would have bought a LG V50, but alas, no unlocked model and the Korean varient didn't have the bands needed.
Smartphones are a weird device because I think the whole market could have turned out differently, right before the switchover we had phones that had weeks of standby time and direct usage many times over what a smartphone had. Had the industry decided to chase different metrics instead of pure power and instead chose a slightly different balance between power and longevity you wouldn't know any different because that would be the world you know. If everyone kept the jack you wouldn't know any better. If Apple had proper file support you wouldn't know any better. Because all of this is somewhat irrelevant and based purely on what companies decide to put out.
Just the tech sector is the only one where people seem to cheer features getting cut. I find that hilarious. That's what makes a person a sheep. I don't know why anyone would ever champion a feature getting cut from anything.
