I realize this is true, and sometimes I will charge sooner or stop charging earlier to keep my phone in this range. But most of the time, I just use my phone. After all, what's the point of optimizing the total battery life if you aren't ever going to actually use the battery to its capacity?

Artificially limiting yourself to 40% of your battery’s capacity to extend its life seems like an enormous waste of effort

My last phone spent like 8-10 hours a day on and off a wireless charger and had 88% battery health when I sold it over two years after I bought it

A 10-80% load cycle will be almost as good as 50-80%, and much more practical.