If you don't charge fully until just before the user's normal wakeup time you aren't keeping it all the way full all the time.
You protect the battery lifespan and get a full charge at the beginning of the day, instead of having a battery that constantly holds less charge.
You keep repeating this and seem to ignore my observation that if the battery isn't drained below 80% when I plug it in, it will recharge it fully immediately. It will not wait until the user's wake-up time.
And in my case, it's rare that the battery falls below 80%, so whenever I plug it in, it gets recharged fully right away.
So, in practice, it's all the way full all the time.
Yet year after year, surveys show that more battery life is the feature people want in a phone the most.
> 9 out of 10 phone users have low-battery anxiety
https://electrontogo.com/blog/9-out-of-10-phone-users-have-l...
Intentionally throttling the battery's ability to charge no matter what is going the wrong way.