Engage with the content of his comment instead of resorting to ad hominem.
He's right - the market wants embedded batteries, although perhaps not directly. Embedded batteries have improved price, battery capacity, water proofing, size, and strength. If the consumer really wanted a removable battery and all that that entails then there would be more phones that offered that. The reality is people misjudge what all that entails. By all means, I would love to just make the iPhone battery directly replaceable without any compromises but that's not reality.
Incorrect. Replaceable battery is a feature that decreases sales. Why would you implement it when battery being weak will cause substantial amount of users to replace phone instead of paying for service to replace the battery ?
If the feature isn't expected and it decrease sales, why would manufacturer put it in ?
You say "the market wants" like consumers are given much choice.
Using that hypothesis, the market also loves cookie banners and prefers subscriptions over one-time payments.
You can buy phones with non-embedded batteries but they suck. That's not a coincidence.
What is your hypothesis for why more phones arent designed with non-embedded, directly replacable batteries? If it's such a highly valued trait in a phone, why doesnt some company just gobble up that market share? Why havent existing solutions sold well? Mine is that consumers dont actually value non-embedded batteries when accounting for all the tradeoffs. What's your hypothesis?
"instead of resorting to ad hominem" Was this edited out or which part do you mean?
I originally did engage with the comment. Water-resistance absolutely still is physically possible if the replacement battery is waterproof. Water can over time be corrosive at the contacts, but that's a risk for the user. It does not in any way imply that water will enter the internals of the device from the point of contact with the battery. This will require a bit of engineering at the contact to ensure that water doesn't enter the device. As for the size argument, adding 2 mm of thickness is less important than providing five years of extra life.
Wait, are you proposing sealing the phone and sealing the battery separately, but not sealing the contacts between them? That’s… super sketchy for salt water immersion. Unless you add fuses and a BMS and safety mechanisms into the “battery”. In which case wouldn’t customers want to be able to replace the actual battery within the now-a-battery-plus-computer phone accessory once it wears down?