What? You got tripped up on my wording, sorry. But the article's premise is valid, and it's not cool that the top comment on this submission for its first three hours on HN has totally lacked curiosity and come to a sensationalist conclusion. Do you have any actual problems with the article? Could you list them? (You responded to others but not my previous comment)
The claim from the article is that a fixed 'charge to 80% feature' is "likely possible on earlier models". I asked Apple to comment and am curious what they say. We do have evidence for the article's claim: iPhones dating back to at least the iPhone 8 support a feature that limits charging to 80% for multiple hours per day already. It just only occurs during hours Apple chooses via its learning algorithm. I never claim that the hardware is/is-not different; you simply have to look at what is already supported to understand what the devices are capable of.