This thread is old. Of course this is an actual issue since most people won't be keeping their phone for only a year, since they're capable of so much after two or three years. But everyone should enjoy the best battery capacity they can get. And it's not because they're cheap, or because they can always buy a new phone or replace the battery in a service, but because it degrades the user experience. People don't necessarily need 100% of 4000mAh nowadays, but if they use it heavily during the day, it will eventually lose capacity after a year and the experience will degrade slowly and painfully.
Proof that manufacturers are aware of the issue: Apple has introduced a similar "AI" function that learns the user's sleep habits and charges to the phone to 80% until just before he wakes up. Then tops up to 100%. But it doesn't necessarily work, since people's schedules are diverse. And that's why iPhone users still ask for a Chargie app for their phones, in spite of iOS's native functionality.
Disclosure: I am Ovidiu Sandru, the creator of Chargie. I'm not making a fortune off this device, but rather get a lot of gratitude and a small boost for my other high-tech projects. I'm doing it for the right purposes, it's not a scam, if anyone still fears that. We do ship our product.
And I'm working on the app every day to make it compatible with every phone out there. You can get Chargie at
https://chargie.org. After the app is mature enough, I will ship it to Dave for a review.