There is no proof that any of this that you are talking about from a home user charging point of view (worrying about keeping the car awake longer for a few HOURS by slow charging, vs a few days, weeks etc) will matter even enough to measure over a 4-5 year period.
Right, none of this should be worried about, but you seem to want to worry about it. There is no proof that either leaving it at 10% for a few hours, or slow charging for a few hours is harmful to the battery.
What is NOT UP FOR DEBATE however, is that slower charging will keep the car awake longer, thus costing the person more money, and put more "miles" of usage on the battery. Whether the additional usage matters or not is up for debate, but what ISNT, is that the longer you keep the car awake, the more its going to cost to charge, and the more you will add usage (miles) to the battery.
You do you, though.