>waterproof a headphone jack is some an intractable problem.
The explanation (possibly inaccurate) I read was that the waterproof jacks were more expensive. I noticed the new Samsung A8s has copied Apple's decision to remove headphone jack. Sony also removed the headphone jack. There seems to be an unavoidable engineering+cost motivation that causes multiple companies to remove that jack. Is it the edge-to-hedge screen? extra space for the haptic feedback? Better battery life because it doesn't feed the analog circuitry for that 3.5mm jack? I don't know.
> I noticed the new Samsung A8s has copied Apple's decision to remove headphone jack.
Sure, and there are perennial rumors that real soon now that will be reflected on flagships (first the S10, but then that faded, now the rumor is either the Note 10 or S11.)
> There seems to be an unavoidable engineering+cost motivation that multiple companies (including Sony) to remove that jack.
Well, yeah, of course, if nothing else, it takes space that could be used for something else. The Samsung Note 10 rumor centers around trading it for a bigger battery, for instance. Obviously, it's not a trade-off free choice, and what it's traded for may not be the same between different manufacturers that decide to axe it. (The same with SD card slots, which lots of manufacturers have done—even Samsung several flagship generations back, though they reversed.)
Apple certainly isn't hurting for profits, in general or on a per-unit basis. Fobbing it off as "Your iPhone would cost $1.08 more, so we're looking out for you!" is just Apple spinning it the way they want.
The explanation (possibly inaccurate) I read was that the waterproof jacks were more expensive. I noticed the new Samsung A8s has copied Apple's decision to remove headphone jack. Sony also removed the headphone jack. There seems to be an unavoidable engineering+cost motivation that causes multiple companies to remove that jack. Is it the edge-to-hedge screen? extra space for the haptic feedback? Better battery life because it doesn't feed the analog circuitry for that 3.5mm jack? I don't know.