I was more referring to the general stuff mentioned in that post (as quoted). Batteries do not like to be kept drained (running the iPhone down to 10% daily may not be ideal, either) or at high levels for a long time. My iPhone 15 Pro Max still has a max capacity of 100% after one year. With just the normal settings (optimized charging, no fixed level of 80%, daily charging for three hours, at always the exact same times - Apple is able to do its job preserving my battery’s health under those circumstances, without the 80% limit). And I get to use the full battery’s capacity if needed.
I think, Gruber has a point when he is saying: “(…) there’s no practical point to limiting your iPhone’s charging capacity. All you’re doing is preventing yourself from ever enjoying a 100-percent-capacity battery. Let the device manage its own battery. Apple has put a lot of engineering into making that really smart.” This is exactly what I have experienced and that is the point I was trying to make.